CN109400011A - A kind of nanometer heat insulation material material and its mixed method, nanometer heat insulation material and preparation method thereof - Google Patents
A kind of nanometer heat insulation material material and its mixed method, nanometer heat insulation material and preparation method thereof Download PDFInfo
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- CN109400011A CN109400011A CN201811409159.3A CN201811409159A CN109400011A CN 109400011 A CN109400011 A CN 109400011A CN 201811409159 A CN201811409159 A CN 201811409159A CN 109400011 A CN109400011 A CN 109400011A
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- 239000012774 insulation material Substances 0.000 title claims abstract description 139
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- 238000002360 preparation method Methods 0.000 title abstract description 23
- 239000000835 fiber Substances 0.000 claims abstract description 118
- 239000000203 mixture Substances 0.000 claims abstract description 66
- 239000000919 ceramic Substances 0.000 claims abstract description 56
- 230000004927 fusion Effects 0.000 claims abstract description 47
- 239000011858 nanopowder Substances 0.000 claims abstract description 41
- 239000006185 dispersion Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229920000609 methyl cellulose Polymers 0.000 claims abstract description 13
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- 239000000843 powder Substances 0.000 claims description 33
- 238000000465 moulding Methods 0.000 claims description 32
- 239000010453 quartz Substances 0.000 claims description 32
- 239000002002 slurry Substances 0.000 claims description 19
- 239000000377 silicon dioxide Substances 0.000 claims description 15
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 13
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 12
- 239000003365 glass fiber Substances 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 6
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 6
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 3
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- 230000008859 change Effects 0.000 claims description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 2
- 229910052863 mullite Inorganic materials 0.000 claims description 2
- 239000005543 nano-size silicon particle Substances 0.000 claims description 2
- 235000009566 rice Nutrition 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 claims 1
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- 239000002105 nanoparticle Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/28—Polysaccharides or derivatives thereof
- C04B26/285—Cellulose or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The present invention relates to a kind of nanometer heat insulation material material and its mixed method, nanometer heat insulation materials and preparation method thereof.Mixed method are as follows: ceramic fibre is uniformly dispersed with water, is then dried, pre-dispersed ceramic fibre is obtained；Nano-powder, pre-dispersed ceramic fibre and dispersion aids selected from the group being made of neopelex, methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and polyethylene glycol oxide are subjected to mechanical fusion, obtain nanometer heat insulation material material.The nanometer heat insulation material the preparation method comprises the following steps: by being uniformly mixed by weight percentage for 85~100% material and 0~15% additive, obtain mixture；Mixture is molded, nanometer heat insulation material is made.Mixed method in the present invention realizes the uniform mixing of material under the premise of not destroying the microstructure of fiber morphology and nano-powder；The present invention can be made that density is small, thermal coefficient is low, the nanometer heat insulation material of excellent in mechanical performance.
Description
Technical field
The invention belongs to functional composite material technical field more particularly to a kind of nanometer heat insulation material material and its mixing
Method, nanometer heat insulation material and preparation method thereof.
Background technique
High-temperature fibre, nano-powder are the main raw material(s) for preparing high-performance nano heat-barrier material, the main work of fiber
With being mechanics enhancing, the main function of nano-powder is to inhibit heat transmitting, is used to prepare after two kinds of raw material are evenly dispersed efficiently
Nanometer heat insulation material, therefore powder fiber pre-processes the performance that mixed quality directly affects efficient nano heat-barrier material.
In order to guarantee that powder fiber preferably pre-processes mixing, it is necessary to scattered fiber and powder.Disperse from fiber
Angle sees mainly there is physical dispersion and function additive dispersion, but inorfil brittleness is big, and diameter is small, surface area is big, Yi Cheng
Beam, fiber dispersion can be poor, and current main powder fiber dispersing method has: 1, ultrasonic disperse belongs to wet dispersion, and leads to
It crosses the material that wet dispersion obtains and needs first to remove solvent in nanometer heat insulation material in subsequent prepare, and the removal process meeting of solvent
The density of material is caused to increase, the thermal coefficient of material increases, and high performance nanometer heat insulation material can not be made；2, mechanical stirring
Dispersion causes the movement of liquid stream strong turbulence to cause particle agglomeration size degradation, fiber beam spreading solution, to accelerate by strong mechanical stirring
Dispersion, also belongs to wet dispersion；3, kneader, is mainly used in high viscosity, the mixing of high-elastic plastic material, dispersion, and stemness is low
The dispersion effect of binder fiber is bad；4, conventional mechanical disperses, and easily causes fibrous fracture, weakens reinforcing effect, limits fiber
Mechanics enhances the performance of performance, is unfavorable for improving the comprehensive performance of nanometer heat insulation material.
Therefore need to provide a kind of pretreatment mixed method of nano-powder fiber, to prepare high-performance nano heat-barrier material
It lays the foundation.
Summary of the invention
In order to solve one or more technical problem existing in the prior art, the present invention provides a kind of nano heat-insulatings
Material material and its mixed method, nanometer heat insulation material and preparation method thereof.Mixed method in the present invention is not destroying fibre
Under the premise of the microstructure for tieing up pattern and nano-powder, the uniform mixing of material is realized；The method of the present invention can be made close
Spend that small, thermal coefficient is low, the high-performance nano heat-barrier material of excellent in mechanical performance.
To achieve the goals above, the present invention provides a kind of preparation method of nanometer heat insulation material, institute in first aspect
The method of stating includes the following steps:
(1) ceramic fibre is uniformly dispersed with water, obtains slurry, then dry the slurry, obtain pre-dispersed pottery
Porcelain fiber；
(2) by nano-powder, pre-dispersed ceramic fibre and selected from by neopelex, methylcellulose, carboxylic
The dispersion aids of the group of methylcellulose, hydroxyethyl cellulose and polyethylene glycol oxide composition carries out mechanical fusion, and it is equal to obtain mixing
Even nanometer heat insulation material material.
Preferably, the nanometer heat insulation material material by by weight percentage for 55~85% nano-powder, 14
~40% pre-dispersed ceramic fibre and 0.5~5% dispersion aids composition；And/or in step (1), the ceramics are fine
The dosage of dimension is 0.5~1wt% of the dosage of the water.
Preferably, the revolving speed of the mechanical fusion is 300~1600r/min, time of the mechanical fusion is 1~
3600min。
Preferably, the nano-powder is selected from by silica nano-powder, nanometer alumina powder, zirconia nano-powder
The group of body, nano-sized SiC powder and Nano-silicon Nitride Powder composition；And/or the ceramic fibre is selected from by quartz fibre, height
The group of silica fiber, glass fibre, mullite fiber, basalt cotton fiber, alumina fibre and Zirconium oxide fibre composition.
Preferably, the partial size of the nano-powder is 0.1~1000nm；And/or the diameter of the ceramic fibre be 0.1~
50um, the length of the ceramic fibre are 0.1~50mm.
The present invention provides the nano heat-insulating material that mixed method of the present invention described in first aspect obtains in second aspect
Material uses material.
The present invention provides the nano heat-insulating material that mixed method of the present invention described in first aspect obtains in the third aspect
The method that material prepares nanometer heat insulation material with material, described method includes following steps:
(a) it will be mixed by weight percentage for 85~100% nanometer heat insulation material material and 0~15% additive
It closes uniformly, obtains mixture；
(b) mixture in step (a) is molded, nanometer heat insulation material is made.
Preferably, the method also includes carrying out pressure maintaining for nanometer heat insulation material obtained in step (b).
Preferably, the pressure of the molding is 0.5~20MPa, and the speed of the molding is 0.1~50mm/s；The guarantor
The pressure of pressure is identical as the pressure of the molding, and the time of the pressure maintaining is 0.5~60min；And/or the additive be selected from by
The group of silicon carbide, silicon nitride, titanium dioxide and carbon dust composition.
The present invention provides the nano heat-insulating material that mixed method of the present invention described in first aspect obtains in fourth aspect
Nanometer heat insulation material made from the method for material material or the present invention described in the third aspect.
The present invention at least have compared with prior art it is following the utility model has the advantages that
(1) present invention first carries out ceramic fibre pre-dispersed, then by nano-powder, pre-dispersed ceramic fibre and helps
Dispersing agent carries out mechanical fusion, wherein pre-dispersed ceramic fibre is conducive to improve the effect of mechanical fusion, nano-powder and pre-
The ceramic fibre of dispersion is able to carry out stable fusion, and dispersion aids is added and similarly effectively promotes the mixing point of material
Effect is dissipated, the present invention can leniently be dispersed fiber by the way of mechanical fusion, not destroy fiber morphology and nano-powder
Microstructure under the premise of, realize the uniform mixing of material, solve material present in existing dispersion mixing process mixing not
Uniformly, be easy to lead to problems such as in mixed process fibrous fracture, nano-powder it is destructurized.
(2) mixed method of the invention is not necessarily to add the dispersion solvent of liquid, belongs to dry mixed, is suitable for preparation density
Low, the high-performance nanos heat-barrier material such as thermal coefficient is low, and it is easy the composition and ratio of accurate control material, it is final to realize to height
The preparation of performance nanometer heat insulation material.
(3) mixed method in the present invention can be used for uniformly mixing nano-powder and ceramic fibre, to prepare high-performance
Nanometer heat insulation material is laid a good foundation；In addition, the mixed method in the present invention can also be used for other micrometer/nanometer scale complexs
The mixing of system has universality.
(4) method that nanometer heat insulation material is prepared in the present invention, using nanometer heat insulation material material of the present invention
For raw material, so that nanometer heat insulation material produced by the present invention has, density is small, thermal coefficient is low, mechanical strength is high, comprehensive performance
The advantages that excellent, the method that the present invention prepares nanometer heat insulation material is simple and fast, low to equipment and environmental requirement, be it is a kind of it is low at
This nanometer heat insulation material preparation method；The method parameter easy-regulating for preparing nanometer heat insulation material of the invention, can be according to work
Skill needs are adjusted.
Detailed description of the invention
Attached drawing of the present invention only provides for the purpose of illustration, and the size in figure is not necessarily consistent with actual product.
Fig. 1 is not same order of the ceramic fibre in a specific embodiment of mixed method of the present invention in pre-dispersing operation
The pictorial diagram of section.In figure: the pictorial diagram of the ceramic fibre before (a) indicating pre-dispersed；(b) indicate mixed comprising ceramic fibre and water
Close the pictorial diagram of object；(c) the part pictorial diagram of the finely dispersed slurry comprising ceramic fibre and water is indicated；(d) ceramics are indicated
Fiber filters out the pictorial diagram after water；(e) pictorial diagram of pre-dispersed ceramic fibre is indicated.
Fig. 2 is the pictorial diagram of the nano-powder in a specific embodiment of mixed method of the present invention.
Fig. 3 is the pictorial diagram for the pre-dispersed ceramic fibre for including in Fig. 1.
Fig. 4 is the pictorial diagram of the nanometer heat insulation material material in a specific embodiment of mixed method of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the embodiment in the present invention
Technical solution of the present invention is clearly and completely described, it is clear that described embodiment is that a part of the invention is implemented
Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creativeness
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of labour.
The present invention provides a kind of mixed method of nanometer heat insulation material material in first aspect, and the method includes such as
Lower step:
(1) ceramic fibre is uniformly dispersed with water, obtains slurry, then dry the slurry, obtain pre-dispersed pottery
Porcelain fiber；In the present invention, such as wet ceramic fibre can be uniformly dispersed under blender effect, obtains slurry, then
It filters out dispersing agent (water) to dry the slurry, obtains the ceramic fibre of pre-dispersed (pretreatment)；The present invention is to the blender
The revolving speed of (high speed disperser) and the time being dispersed with stirring are not particularly limited, and the revolving speed of the blender for example can be
500~1000r/min (such as 500,600,700,800,900 or 1000r/min), the time being dispersed with stirring for example can be 1
~20min (such as 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19 or 20min)；In the present invention
In, the temperature of the drying for example can be 80~120 DEG C, and the time of the drying for example can be 24~36h；
(2) by nano-powder, pre-dispersed ceramic fibre and selected from by neopelex, methylcellulose, carboxylic
The dispersion aids of the group of methylcellulose, hydroxyethyl cellulose and polyethylene glycol oxide (PEO) composition carries out mechanical fusion, is mixed
Close uniform nanometer heat insulation material material.It in the present invention, such as can be by described in the progress of existing mechanical fusion equipment
Mechanical fusion；In the present invention, for example, the nano-powder, pre-dispersed ceramic fibre and dispersion aids are put into machinery
In fusion device, the powder substance first in the rotation container (revolving sleeve) of mechanical fusion equipment is acted on by centrifugal force, simultaneously
Under pressure head auxiliary, safely dispersed towards squeezing on the chamber wall of rotation container, the powder substance being extruded is from revolving sleeve
Hole at be discharged, then brought by circulating blade to the extruding dispersion for above revolving sleeve, repeating front, in this way, nano-powder
Fusion can be stablized under certain revolving speed and time effect with pre-dispersed ceramic fibre, it is final to realize nano-powder and ceramics
Fiber it is evenly dispersed.
The present invention first carries out ceramic fibre pre-dispersed, then by nano-powder, pre-dispersed ceramic fibre and helps point
Powder carries out mechanical fusion, wherein first by the way that ceramic fibre is become puffy, puffy to ceramic fibre progress is pre-dispersed
Ceramic fibre can effectively improve the effect of mechanical fusion, realize that the efficient mixing of nano-powder and ceramic fibre disperses, with
Ceramic fibre is directly subjected to dispersed phase ratio by stirring action, without strict control dispersion revolving speed and time, revolving speed is not present
The too low or time, the too short fiber that will lead to was unable to fully disperse, and revolving speed is too high or the time is too long, can make fibrous fracture, to drop
The problem of low reinforcing effect；Nano-powder and pre-dispersed ceramic fibre in the present invention are able to carry out stable fusion, and add
Enter dispersion aids and similarly effectively promote the mixing dispersion effect of material, the present invention being capable of temperature by the way of mechanical fusion
The uniform mixing of material is realized under the premise of not destroying the microstructure of fiber morphology and nano-powder with ground dispersion fiber, is solved
Material present in existing dispersion mixing process of having determined mixing is uneven, avoids and is easy to lead in simple and mechanical mixing dispersion process
The problems such as causing fiber cut-off, nano-powder destructurized.
Mixed method of the invention is not necessarily to add the dispersion solvent of liquid, belongs to dry mixed, low suitable for preparation density,
The low equal high-performance nanos heat-barrier material of thermal coefficient, and it is easy the composition and ratio of accurate control material, it is final to realize to high property
The preparation of energy nanometer heat insulation material.
According to some preferred embodiments, the nanometer heat insulation material material by by weight percentage be 55~
The nano-powder of 85% (such as 55%, 60%, 65%, 70%, 75%, 80% or 85%), 14~40% (such as 14%,
16%, 18%, 20%, 22%, 25%, 28%, 30%, 32%, 35%, 38% or pre-dispersed ceramic fibre 40%) and
0.5~5% (such as 0.5%, 0.8%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5% or 5%) helps point
Powder composition.In the present invention, the dispersion aids that the especially dosage of each component under this proportion is 0.5~5%, can more have
Effect ground guarantees the mixed uniformity of nano-powder and ceramic fibre, and the nanometer heat insulation material material under this proportion
It is more advantageous to the efficient nano heat-barrier material of obtained excellent combination property.
According to some preferred embodiments, in step (1), the dosage of the ceramic fibre is the dosage of the water
0.5~1wt% (such as 0.5wt%, 0.55wt%, 0.6wt%, 0.65wt%, 0.7wt%, 0.75wt%, 0.8wt%,
0.85wt%, 0.9wt%, 0.95wt% or 1wt%).In the present invention, excellent when carrying out pre-dispersed to the ceramic fibre
The mass ratio for being selected as the ceramic fibre and the water is (0.5~1): 100, it can better ensure that ceramic fibre is pre-dispersed
Effect, to better assure that the uniformity of subsequent nano-powder and ceramic fibre mixing dispersion.
According to some preferred embodiments, the revolving speed of the mechanical fusion be 300~1600r/min (such as 300,
400,500,600,700,800,900,1000,1100,1200,1300,1400,1500 or 1600r/min), preferably 1000
The time of~1500r/min (1000,1100,1200,1300,1400 or 1500r/min) described mechanical fusion be 1~
3600min (such as 1,5,10,20,30,60,80,120,160,200,240,280,320,360,400,500,600,700,
800,900,1000,1200,1600,2000,2400,3000 or 3600min), preferably 30~180min (such as 30,60,
120,150 or 180min).
According to some preferred embodiments, the nano-powder is selected from by silica nano-powder (such as silicon monoxide
Nano-powder or silicon dioxide nano powder), nanometer alumina powder, nm-class powder of zirconium oxide, nano-sized SiC powder and nitrogen
The group of SiClx nano-powder composition；And/or the ceramic fibre is selected from by quartz fibre, high silica fiber, glass fibre, Mo Lai
The group of mineral wool, basalt cotton fiber, alumina fibre and Zirconium oxide fibre composition.
According to some preferred embodiments, the partial size of the nano-powder is 0.1~1000nm, preferably 5~
100nm；And/or the diameter of the ceramic fibre is 0.1~50um, the length of the ceramic fibre is 0.1~50mm.
The present invention provides the nano heat-insulating that the mixed method as the present invention described in first aspect obtains in second aspect
Material material.The density for the nanometer heat insulation material material that the present invention obtains is 0.03~0.09g/cm3, room temperature thermal conductivity
0.014~0.035W/mK of rate.
The present invention provides the nano heat-insulating that the mixed method as the present invention described in first aspect obtains in the third aspect
The method that material prepares nanometer heat insulation material with material, described method includes following steps:
(a) will by weight percentage for 85~100% (such as 85%, 88%, 90%, 92%, 95%, 98% or
100%) nanometer heat insulation material material and 0~15% (such as 0%, 1%, 2%, 5%, 8%, 10%, 12% or 15%)
Additive (such as with the additive for inhibiting thermal radiation function) be uniformly mixed (such as by mechanical dispersion or mechanical fusion
Mode is uniformly mixed), obtain mixture；It certainly in the present invention, can also be fine by the nano-powder, pre-dispersed ceramics
Dimension, the additive and selected from by neopelex, methylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose and
The dispersion aids of the group of polyethylene glycol oxide (PEO) composition carries out the mechanical fusion together, obtains the mixture.
(b) mixture in step (a) is molded (compression molding or compression moulding), nanometer heat insulation material is made；
For example, in the present invention, the mixture in step (a) is layed in mold, mixture to be molded is stirred by scraper plate, is made
Laying it is uniform after carry out the compression molding again, advantageously ensure that the quality and performance of nanometer heat insulation material；In the present invention
In, the molding can for example be carried out using press or the equipment for being capable of providing equivalent pressure.
The method that nanometer heat insulation material is prepared in the present invention uses nanometer heat insulation material material of the present invention for original
Expect, each component in the nanometer heat insulation material material can give full play to respective effect, so that nanometer produced by the present invention
Heat-barrier material has many advantages, such as that density is small, thermal coefficient is low, mechanical strength is high, excellent combination property, the present invention prepare nanometer every
The method of hot material is simple and fast, low to equipment and environmental requirement, is a kind of nanometer heat insulation material preparation method of low cost；This
The method parameter easy-regulating for preparing nanometer heat insulation material of invention, can be adjusted according to process requirement.
According to some preferred embodiments, in step (b), the mixture in step (a) is subjected to gradient molding, system
Obtain the nanometer heat insulation material；The gradient-norm briquetting includes following sub-step:
S1: the mixture in step (a) is divided into more parts of materials；Such as the mixture can be divided into 3~10 parts of objects
Material；
S2: a material in the more parts of materials is laid with (stone) in being molded in mold, obtains nano heat-insulating
First layered material of material；
S3: step S2 is repeated on the basis of obtained first layered material to carry out next layer of the nanometer heat insulation material
The preparation of material is so constantly repeated up to and reaches predetermined layered material number or predetermined thickness, the nanometer heat insulation material is thus made.
In the present invention, for the mixture is divided into 5 parts of materials, i.e., the described mixture is by first part of material,
Two parts of materials, third part material, the 4th part of material and the 5th part of material composition, correspondingly, first part of material carries out after being laid with
Molding obtains the first layered material, and second part of material is molded to obtain the second layered material after being laid with, and third part material carries out mould after being laid with
Pressure obtains third layered material, and the 4th part of material is molded to obtain the 4th layered material after being laid with, and the 5th part of material is molded after being laid with
Obtain layer 5 material；It illustrates, in the present invention, term " first ", " second ", " third ", " the 4th ", " the 5th " etc.
It is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance；For the ordinary skill in the art,
Visual concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention, it is preferred to prepare nanometer heat insulation material using the method for gradient molding (gradually be molded), by by
Step suppresses fluffy nanometer heat insulation material material, is further continued for stone after each step compacting, carries out the compacting of next step, gradually press
To the material thickness of design, the nanometer heat insulation material of required thickness is prepared.The method of the present invention due to be gradually thin layer compacting, and
And matched between each component it is suitable so that the gas in fiber powder hole is easy to be discharged, powder fiber can effective force, this
Inventive method, which can effectively solve directly to be molded fluffy nanometer heat insulation material, to be also easy to produce internal flaw with material and works as larger thickness
Molding pressure cannot be transmitted effectively downwards and cause to easily cause intralayer defects by fluffy nanometer heat insulation material material in material
Problem can effectively improve the structural intergrity of nanometer heat insulation material, be further ensured that the mechanical property of the nanometer heat insulation material
Energy.
According to some preferred embodiments, in step s3, next layered material of the nanometer heat insulation material is being carried out
Before preparation, pressure maintaining first is carried out to a upper layered material for the nanometer heat insulation material.In the present invention, it is preferred to be molded in each step
Pressure maintaining is carried out after (compacting) and carries out pressure maintaining after each process of molding, can be released effectively residual stress, further really
It protects nanometer heat insulation material interlayer flawless to generate, guarantees that the nanometer heat insulation material that performance is stable, has excellent performance is made.Certainly, exist
In the present invention, when being molded by the way of gradient molding to the mixture, mould can also carried out to every part of material
Without pressure maintaining after pressure, pressure maintaining is carried out after the molding of all materials to be done again, plays the role of discharging stress, being finally completed property
The preparation for the nanometer heat insulation material can stablize, haveing excellent performance.In the present invention, institute more preferably is carried out after the compacting of each step
Pressure maintaining is stated, can so guarantee that the effect of residual stress release is more preferable, the inside of nanometer heat insulation material can preferably be avoided to lack
Fall into the generation with intralayer defects.
According to some preferred embodiments, in step s3, next layered material of the nanometer heat insulation material is being carried out
Before preparation, loose processing (roughening treatment) first is carried out to the surface layer of a upper layered material for the nanometer heat insulation material；In this hair
In bright, such as can be by small tooling target piece by the surface layer material target pine of a upper layered material, so that upper one layer of nanometer heat insulation material
Expect that surface layer (surface) is loose.In the present invention, it is preferred to so may be used to carry out the preparation of next layered material after loose again to thin layer surface
To be effectively improved the interface of upper a layered material and next layered material, interlayer matching is improved, in this way, obtained receive can be further ensured that
Rice heat-barrier material is generated without Interlaminar Crack, further increases the mechanical property of nanometer heat insulation material.
According to some preferred embodiments, in step s3, next layered material of the nanometer heat insulation material is being carried out
Before preparation, the loose processing step of pressure holding step and surface layer is successively first carried out to a upper layered material for the nanometer heat insulation material.
According to some preferred embodiments, in step sl, the mixture is divided into and accounts for the total of the mixture
The identical more parts of materials of the weight percent of weight.In the present invention, it is preferred to for using the gradient molding of the weight blanking such as this
Molding mode is effectively protected it is possible to prevente effectively from unevenly easily causing the non-uniform problem of material each section due to stone
The homogeneity for having demonstrate,proved nanometer heat insulation material each section density enables to its thickness direction density variation within 5%, to have
Conducive to the quality and performance for guaranteeing nanometer heat insulation material.
According to some preferred embodiments, the method also includes in step (b), by nanometer heat insulation material obtained
The step of carrying out pressure maintaining can so play the role of discharging stress, be finally completed the nano heat-insulating that performance is stable, has excellent performance
The preparation of material can reduce the internal flaw of nanometer heat insulation material and the generation of intralayer defects.
According to some preferred embodiments, the pressure of the molding be 0.5~20MPa (such as 0.5,1,2,3,4,5,
6,7,8,9,10,11,12,13,14,15,16,17,18,19 or 20MPa), the speed of the molding is 0.1~50mm/s (example
Such as 0.1,5,10,15,20,25,30,35,40,45 or 50mm/s), preferably 2~10mm/s (such as 2,3,4,5,6,7,8,9
Or 10mm)；The pressure of the pressure maintaining is identical as the pressure of the molding, time of the pressure maintaining be 0.5~60min (such as
0.5,5,8,10,12,15,18,20,22,25,28,30,32,35,38,40,42,45,48,50,52,55,58 or 60min),
Preferably 0.5~20min (such as 0.5,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19 or
20min).In the present invention, it is carried out by parameters such as the times of the speed of pressure, molding to the molding and pressure maintaining excellent
Change, it is ensured that the less nanometer heat insulation material with the less excellent in mechanical performance of intralayer defects of internal flaw is made.
According to some preferred embodiments, the additive is selected from by silicon carbide (carborundum powder), silicon nitride (silicon nitride
Powder), titanium dioxide (titanium dioxide powder) and carbon dust composition group.
The present invention provides the nano heat-insulating that the mixed method as the present invention described in first aspect obtains in fourth aspect
Nanometer heat insulation material made from method described in material material or third aspect present invention.Nano heat-insulating material produced by the present invention
Material has many advantages, such as that density is small, thermal coefficient is low, mechanical strength is high, excellent combination property；Nanometer heat insulation material energy of the invention
Be enough in High Mach number aircraft prevents heat-insulated, can also apply in fields such as civilian kiln ladles.
According to some preferred embodiments, the density of the nanometer heat insulation material is 0.10~1.0g/cm3, room temperature leads
Hot coefficient is 0.014W/mK~0.045W/mK, and thickness direction tensile strength is 0.3~0.9MPa, and thickness direction compression is strong
Degree is 0.5~1.6MPa.In the present invention, nanometer heat insulation material is also denoted as high-performance nano heat-barrier material.
Hereafter the present invention will be further detailed by way of example, but protection scope of the present invention is unlimited
In these embodiments.
Embodiment 1
1. quartz fibre is uniformly dispersed with water, slurry is obtained, wherein the mass ratio of quartz fibre and water is 0.5:100；
Then finely dispersed slurry is filtered out into tooling dispersing agent, mold quartz fibre and dried, obtain pre-dispersed quartz
Fiber.
2. according to silica nanometer powder: pre-dispersed quartz fibre: methylcellulose=500:100:6 (mass ratio)
Ratio preparating mixture, for use.
3. mixture is put into mechanical fusion equipment, the revolving speed of mechanical fusion is 1200r/min, the time of mechanical fusion
For 60min.
4. taking out uniformly mixed material, nanometer heat insulation material material is obtained, is numbered, for use.
5. according to nanometer heat insulation material material: the ratio preparating mixture of silicon carbide=900:90 (mass ratio) simultaneously uses
Mechanical fusion equipment is uniformly mixed, and obtains mixture, and the revolving speed of mechanical fusion is 1200r/min, and the time of mechanical fusion is
20min。
6. being laid with mixture in a mold using scraper plate, mold is put into press after molding, and in molding pressure 3MPa, mould
Pressure speed is molded under conditions of being 5mm/s, then carries out pressure maintaining, dwell pressure 3MPa, dwell time 20min, system
Obtain nanometer heat insulation material.
The density of the nanometer heat insulation material that the present embodiment obtains material is 0.04g/cm3, room temperature thermal conductivity 0.014W/
m·K；The density of nanometer heat insulation material made from the present embodiment is 0.203g/cm3, room temperature thermal conductivity 0.014W/mK, thickness
Direction tensile strength 0.56MPa, thickness direction compressive strength are 0.89MPa.
Embodiment 2
1. alumina fibre is uniformly dispersed with water, slurry is obtained, wherein the mass ratio of alumina fibre and water is 0.5:
100；Then finely dispersed slurry is filtered out into tooling dispersing agent, mold alumina fibre and dried, obtained pre-dispersed
Alumina fibre.
2. according to silica nanometer powder: pre-dispersed alumina fibre: methylcellulose=500:120:12 (quality
Than) ratio preparating mixture, for use.
3. mixture is put into mechanical fusion equipment, the revolving speed of mechanical fusion is 1000r/min, the time of mechanical fusion
For 60min.
4. taking out uniformly mixed material, nanometer heat insulation material material is obtained, is numbered, for use.
5. according to nanometer heat insulation material material: the ratio preparating mixture of silicon carbide=900:90 (mass ratio) simultaneously uses
Mechanical fusion equipment is uniformly mixed, and obtains mixture, and the revolving speed of mechanical fusion is 1200r/min, and the time of mechanical fusion is
20min。
6. being laid with mixture in a mold using scraper plate, mold is put into press after molding, and in molding pressure 3MPa, mould
Pressure speed is molded under conditions of being 5mm/s, then carries out pressure maintaining, dwell pressure 3MPa, dwell time 20min, system
Obtain nanometer heat insulation material.
The density of the nanometer heat insulation material that the present embodiment obtains material is 0.06g/cm3, room temperature thermal conductivity 0.028W/
m·K；The density of nanometer heat insulation material made from the present embodiment is 0.282g/cm3, room temperature thermal conductivity 0.028W/mK, thickness
Direction tensile strength 0.65MPa, thickness direction compressive strength are 1.03MPa.
Embodiment 3
1. quartz fibre is uniformly dispersed with water, slurry is obtained, wherein the mass ratio of quartz fibre and water is 0.5:100；
Then finely dispersed slurry is filtered out into tooling dispersing agent, mold quartz fibre and dried, obtain pre-dispersed quartz
Fiber.
2. according to alumina nano powder: pre-dispersed quartz fibre: the ratio of methylcellulose=500:100:6 (mass ratio)
Example preparating mixture, for use.
3. mixture is put into mechanical fusion equipment, the revolving speed of mechanical fusion is 1200r/min, the time of mechanical fusion
For 60min.
4. taking out uniformly mixed material, nanometer heat insulation material material is obtained, is numbered, for use.
5. according to nanometer heat insulation material material: the ratio preparating mixture of silicon carbide=900:90 (mass ratio) simultaneously uses
Mechanical fusion equipment is uniformly mixed, and obtains mixture, and the revolving speed of mechanical fusion is 1200r/min, and the time of mechanical fusion is
20min。
6. being laid with mixture in a mold using scraper plate, mold is put into press after molding, and in molding pressure 3MPa, mould
Pressure speed is molded under conditions of being 5mm/s, then carries out pressure maintaining, dwell pressure 3MPa, dwell time 20min, system
Obtain nanometer heat insulation material.
The density of the nanometer heat insulation material that the present embodiment obtains material is 0.08g/cm3, room temperature thermal conductivity 0.035W/
m·K；The density of nanometer heat insulation material made from the present embodiment is 0.32g/cm3, room temperature thermal conductivity 0.035W/mK, thickness side
To tensile strength 0.76MPa, thickness direction compressive strength is 1.21MPa.
Embodiment 4
Embodiment 4 is substantially the same manner as Example 1, the difference is that:
In 2., according to silica nanometer powder: pre-dispersed quartz fibre: methylcellulose=500:100:30 (matter
Measure ratio) ratio preparating mixture, for use.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that the present embodiment obtains
It is shown.
Embodiment 5
Embodiment 5 is substantially the same manner as Example 1, the difference is that:
In 2., according to silica nanometer powder: pre-dispersed quartz fibre: methylcellulose=500:100:40 (matter
Measure ratio) ratio preparating mixture, for use.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that the present embodiment obtains
It is shown.
Embodiment 6
Embodiment 6 is substantially the same manner as Example 1, the difference is that:
In 2., according to silica nanometer powder: pre-dispersed quartz fibre: methylcellulose=500:100:2 (quality
Than) ratio preparating mixture, for use.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that the present embodiment obtains
It is shown.
Embodiment 7
Embodiment 7 is substantially the same manner as Example 1, the difference is that:
In 2., according to silica nanometer powder: pre-dispersed quartz fibre: neopelex=500:100:
The ratio preparating mixture of 6 (mass ratioes), for use.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that the present embodiment obtains
It is shown.
Embodiment 8
Embodiment 8 is substantially the same manner as Example 1, the difference is that:
In 2., according to silica nanometer powder: pre-dispersed quartz fibre: polyethylene glycol oxide=500:100:6 (quality
Than) ratio preparating mixture, for use.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that the present embodiment obtains
It is shown.
Embodiment 9
Embodiment 9 is substantially the same manner as Example 1, the difference is that:
In 1., quartz fibre is uniformly dispersed with water, obtains slurry, wherein the mass ratio of quartz fibre and water is 1:
100；Then finely dispersed slurry is filtered out into tooling dispersing agent, mold quartz fibre and dried, obtained pre-dispersed
Quartz fibre.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that the present embodiment obtains
It is shown.
Embodiment 10
Embodiment 10 is substantially the same manner as Example 1, the difference is that:
In 1., quartz fibre is uniformly dispersed with water, obtains slurry, wherein the mass ratio of quartz fibre and water is 1.2:
100；Then finely dispersed slurry is filtered out into tooling dispersing agent, mold quartz fibre and dried, obtained pre-dispersed
Quartz fibre.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that the present embodiment obtains
It is shown.
Embodiment 11
Embodiment 11 is substantially the same manner as Example 1, the difference is that: step is 5. and 6. different, and further includes step
⑦。
In 5., according to nanometer heat insulation material material: the ratio preparating mixture of silicon carbide=900:90 (mass ratio)
It is uniformly mixed using mechanical fusion equipment, obtains mixture, the revolving speed of mechanical fusion is 1200r/min, the time of mechanical fusion
For 20min；The identical five parts of materials of the weight percent that the mixture is divided into the total weight for accounting for the mixture, it is described
Five parts of materials by be by weight percentage 20% first part of material, 20% second part of material, 20% third part material,
20% the 4th part of material and 20% the 5th part of material composition.
In 6., it is laid with first part of material in a mold using scraper plate, mold is put into press after molding, and press in molding
Power 3MPa, molding speed are molded under conditions of being 5mm/s, then carry out pressure maintaining, dwell pressure 3MPa, the dwell time is
5min obtains the first layered material.
7. repeating step the first layered material of gained on the basis of 6. to carry out next layered material of the nanometer heat insulation material
Preparation, is so constantly repeated up to and reaches predetermined layered material number or predetermined thickness；In the next layer for carrying out the nanometer heat insulation material
Before the preparation of material, pressure releasing die sinking first carries out loose processing to the surface layer of a upper layered material for the nanometer heat insulation material；Mold is let out
After pressure, the nanometer heat insulation material suppressed is taken out in demoulding.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that the present embodiment obtains
It is shown.
Embodiment 12
Embodiment 12 is substantially the same manner as Example 11, the difference is that: 6. and 7. in, every part of material is molded
Afterwards without pressure maintaining, after the molding of all mixtures to be done, uniformly progress pressure maintaining, dwell pressure 3MPa, dwell time are
Nanometer heat insulation material is made in 20min.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that the present embodiment obtains
It is shown.
Embodiment 13
Embodiment 13 is substantially the same manner as Example 11, the difference is that:
In 7., before carrying out the preparation of next layered material of the nanometer heat insulation material, not to the nano heat-insulating material
The surface layer of a upper layered material for material carries out loose processing.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that the present embodiment obtains
It is shown.
Embodiment 14
Embodiment 14 is substantially the same manner as Example 11, the difference is that:
In 5., the mixture is divided into three parts of materials, three parts of materials are by being by weight percentage 50%
First part of material, 30% second part of material and 20% third part material.
The mode that above-mentioned three parts of materials successively decrease by weight percentage is successively subjected to 6. and 7. step.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that the present embodiment obtains
It is shown.
Comparative example 1
1. taking fumed silica 70wt%, silicon carbide 25wt%, the superfine E-glass fibre glass fibre that length is 5mm
Superfine E-glass fibre glass fibre is added in high speed disperser and carries out pre-dispersed, speed of agitator 600r/min by 5wt%, and the time is
Machinery is added in the superfine E-glass fibre glass fibre, fumed silica powder body material and silicon carbide of pre-dispersed mistake by 1min together
In fusion device, with 1200r/min revolving speed mixing 30min.
2. utilizing steaming and cultivating equipment, the material of mixing and water vapour are come into full contact with into 30min at 80 DEG C, at steaming and cultivating equipment
In the material merging mold managed, with hydraulic press with the final pressure compression moulding of the rate of pressurization of 1N/s and 2MPa.
It is dried 3. finally molding block materials are put into drying box, can be prepared by height through 110 DEG C of heat treatment 6h
The super composite heat-insulated material of performance nano grade silica particles base.
The performance of composite heat-insulated material made from uniformly mixed material and this comparative example in this comparative example is carried out
Test, the results are shown in Table 1.
Comparative example 2
Comparative example 2 is substantially the same manner as Example 1, the difference is that:
In 1., quartz fibre is added in high speed disperser and carries out pre-dispersed, speed of agitator 600r/min, the time is
1min is uniformly dispersed, and obtains pre-dispersed quartz fibre.
In 2., according to silica nanometer powder: the ratio of pre-dispersed quartz fibre=500:100 (mass ratio) is prepared
Mixture, for use.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that this comparative example obtains
It is shown.
Comparative example 3
Comparative example 3 is substantially the same manner as Example 1, the difference is that:
In 2., according to silica nanometer powder: the ratio of pre-dispersed quartz fibre=500:100 (mass ratio) is prepared
Mixture, for use.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that this comparative example obtains
It is shown.
Comparative example 4
Comparative example 4 is substantially the same manner as Example 1, the difference is that:
In 1., quartz fibre is added in high speed disperser and carries out pre-dispersed, speed of agitator 600r/min, the time is
1min is uniformly dispersed, and obtains pre-dispersed quartz fibre.
The performance indicator such as table 1 for the nanometer heat insulation material material and nanometer heat insulation material obtained that this comparative example obtains
It is shown.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of mixed method of nanometer heat insulation material material, which is characterized in that described method includes following steps:
(1) ceramic fibre is uniformly dispersed with water, obtains slurry, then dry the slurry, it is fine to obtain pre-dispersed ceramics
Dimension；
(2) by nano-powder, pre-dispersed ceramic fibre and selected from by neopelex, methylcellulose, carboxymethyl
The dispersion aids of the group of cellulose, hydroxyethyl cellulose and polyethylene glycol oxide composition carries out mechanical fusion, obtains uniformly mixed
Nanometer heat insulation material material.
2. mixed method according to claim 1, it is characterised in that:
The nanometer heat insulation material material by be by weight percentage 55~85% nano-powder, pre- point of 14~40%
Scattered ceramic fibre and 0.5~5% dispersion aids composition；And/or
In step (1), the dosage of the ceramic fibre is 0.5~1wt% of the dosage of the water.
3. mixed method according to claim 1, it is characterised in that:
The revolving speed of the mechanical fusion is 300~1600r/min, and the time of the mechanical fusion is 1~3600min.
4. mixed method according to any one of claims 1 to 3, it is characterised in that:
The nano-powder is selected from by silica nano-powder, nanometer alumina powder, nm-class powder of zirconium oxide, nanometer silicon carbide
The group of powder and Nano-silicon Nitride Powder composition；And/or
The ceramic fibre is selected from by quartz fibre, high silica fiber, glass fibre, mullite fiber, basalt cotton fiber, oxygen
Change the group of aluminum fiber and Zirconium oxide fibre composition.
5. mixed method according to any one of claims 1 to 3, it is characterised in that:
The partial size of the nano-powder is 0.1~1000nm；And/or
The diameter of the ceramic fibre is 0.1~50um, and the length of the ceramic fibre is 0.1~50mm.
6. the nanometer heat insulation material material obtained by mixed method described in any one of claim 1 to 5.
7. preparing nano heat-insulating with material by the nanometer heat insulation material that mixed method described in any one of claim 1 to 5 obtains
The method of material, described method includes following steps:
(a) it will be mixed by weight percentage for 85~100% nanometer heat insulation material material and 0~15% additive equal
It is even, obtain mixture；
(b) mixture in step (a) is molded, nanometer heat insulation material is made.
8. the method according to the description of claim 7 is characterized in that being received the method also includes in step (b) by obtained
The step of rice heat-barrier material carries out pressure maintaining.
9. method according to claim 7 or 8, it is characterised in that:
The pressure of the molding is 0.5~20MPa, and the speed of the molding is 0.1~50mm/s；
The pressure of the pressure maintaining is identical as the pressure of the molding, and the time of the pressure maintaining is 0.5~60min；And/or
The additive is selected from the group being made of silicon carbide, silicon nitride, titanium dioxide and carbon dust.
10. nanometer heat insulation material material or claim that the mixed method as described in any one of claims 1 to 5 obtains
Nanometer heat insulation material made from method described in any one of 7 to 9.
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| CN110483081A (en) * | 2019-09-17 | 2019-11-22 | 航天特种材料及工艺技术研究所 | A kind of high-temperature resistant nano heat-barrier material and preparation method thereof |
| CN110511048A (en) * | 2019-09-27 | 2019-11-29 | 航天特种材料及工艺技术研究所 | A kind of gradient nano heat-barrier material and preparation method thereof |
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| CN113895103A (en) * | 2021-10-09 | 2022-01-07 | 航天特种材料及工艺技术研究所 | High-toughness nano heat-insulating material and preparation method thereof |
| CN114523748A (en) * | 2022-01-22 | 2022-05-24 | 巩义市泛锐熠辉复合材料有限公司 | Surface-enhanced heat insulation material and preparation method thereof |
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