CN107500797B - It is adaptive to block heat-barrier material and preparation method thereof - Google Patents
It is adaptive to block heat-barrier material and preparation method thereof Download PDFInfo
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- CN107500797B CN107500797B CN201710784671.5A CN201710784671A CN107500797B CN 107500797 B CN107500797 B CN 107500797B CN 201710784671 A CN201710784671 A CN 201710784671A CN 107500797 B CN107500797 B CN 107500797B
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- C04B35/806—
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- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/34—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing cold phosphate binders
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- 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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/005—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing gelatineous or gel forming binders, e.g. gelatineous Al(OH)3, sol-gel binders
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- 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
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
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- 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
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- 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
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- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- 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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
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- Structural Engineering (AREA)
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- Compositions Of Oxide Ceramics (AREA)
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Abstract
The invention discloses a kind of expandable materials and preparation method thereof, and wherein the main material of expandable material is grouped as by the group of following parts by weight: alumina fibre 94-96 parts by weight, expansible graphite 4-6 parts by weight.Expandable material of the invention expands the gap for filling up structural member automatically under high temperature, and has thermal insulation.
Description
The application is divisional application, and the applying date of original application is on December 24th, 2014, application No. is
2014108182671, entitled a kind of expandable material and preparation method thereof.
Technical field
The present invention relates to the heat-barrier material technical field of thermal protection more particularly to a kind of expandable material and its preparation sides
Method.
Background technique
Course of new aircraft will be heat-insulated to its engine high efficiency heat insulation material in endoatmosphere long-time fast maneuver
More stringent requirements are proposed for performance.It is current it is both domestic and external study be concentrated mainly on heat-barrier material high temperature low heat conduction, it is high-intensitive with
And multiple layer combination etc..These materials are highly stable under engine off working state, but in engine operation, due to several
The thermal expansion coefficient difference of kind material is larger, often will form biggish gap before heat-barrier material and metal shell, is formed
Gap be direct heat transfer path, influence the heat-proof quality of engine, cause a hidden trouble to the structural reliability of engine.
Therefore, for above-mentioned hidden danger, need to develop it is a kind of can adaptive filling with insulation material and metal shell in engine
Existing gap when work, and the material needs to have preferable heat-proof quality after filling.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of expandable material and preparation method thereof, main purpose is to provide one
Kind expands the gap for filling up structural member automatically, and the expanding material with thermal insulation under high temperature.
In order to achieve the above objectives, present invention generally provides following technical solutions:
On the one hand, the embodiment of the invention provides a kind of expandable material, main material is grouped by the group of following parts by weight
At:
Alumina fibre 94-96 parts by weight,
Expansible graphite 4-6 parts by weight.
Preferably, the expansible graphite partial size is 30-100 mesh, expansion multiplying power 100-300ml/g, phosphorus content
85-95%, pH value 3-7.
Preferably, the alumina fibre is chopped strand or long fibre, the mass percentage of aluminium oxide is greater than
95%, density is greater than 2.5g/cm3, diameter 1-10um, length is less than or equal to 20mm.
Preferably, the length of the alumina fibre is 1-5mm.
Preferably, the expandable material density (after drying) is 0.10-1.00g/cm3, initial expansion temperature is lower than
Volume expansion amount is higher than 300% at 400 DEG C, 900 DEG C, and 1100 DEG C of thermal coefficients are lower than 0.1W/mK, and compressive strength is high under room temperature
In 0.1MPa.
Preferably, the expandable material is the expansible graphite made of multiple main materials-alumina composite material
Precast body is repressed to be combined.
On the other hand, the embodiment of the invention provides a kind of preparation methods of above-mentioned expandable material, comprising the following steps:
Dispersing agent is added in deionized water first, is sufficiently stirred, adds expansible graphite and alumina fibre, is stirred
Uniformly, raw material slurry is obtained；
The raw material slurry of acquisition is filtered by vacuum, until the mass percent concentration of solid phase reaches 0.05-30% in raw material slurry,
Obtain expansible graphite-alumina composite material precast body；
It is needed according to design, multiple expansible graphites-alumina composite material precast body is superimposed by binder, is used
Metal splint method adjusts density and carries out pressure filtration molding, then constant pressure and dry, and it is inflatable to obtain expansible graphite-alumina fibre
Material.
Preferably, the dispersing agent is polyacrylamide, 0.01-0.05 is added in the deionized water of 100 parts by weight
The polyacrylamide of parts by weight.
Preferably, device used by the vacuum filtration includes feed well, blow tank and vacuum pump, feed well is located at
It on blow tank and is interconnected, blow tank connects vacuum pump, and strainer is equipped with inside feed well, one layer of filter is laid on strainer
Paper.
Preferably, the filter paper uses non-woven fabrics or microporous fibre paper.
Preferably, steps are as follows for the vacuum filtration: first on the filter paper by the uniform spreading of raw material slurry in feed well,
Start vacuum pump, the partial moisture in raw material slurry is drained into blow tank through filter paper and strainer, obtains expansible graphite-oxidation
Aluminium composite material precast body, solid concentration can be controlled by filtering time and vacuum degree, and vacuum degree is in -0.05-
Between 0.095MPa.
Preferably, the binder be inorganic glue resistant to high temperature, the inorganic glue resistant to high temperature include phosphate glue and
Aluminum sol.
Preferably, the metal splint method specifically: the equal metal splint of two pieces of thickness, side lengths of setting, metal
Clamping plate is equipped with several bolts hole, and multiple expansible graphite-alumina composite material precast bodies being superimposed by binder are set
Between two pieces of metal splints, two pieces of metal splints are fixed with bolt, the tightness by adjusting metal nuts adjusts inflatable
The density of graphite-alumina composite preform；It sets precast body and density is adjusted as 0.10-1.00g/cm3。
Preferably, the drying condition is drying 2-20 hours at 120 DEG C, the moisture controlled in expandable material contains
Amount is in 0.1-10wt% or less.
Compared with prior art, the beneficial effects of the present invention are:
Expandable material provided in an embodiment of the present invention is prepared into using expansible graphite and alumina fibre as primary raw material
It arrives, is that the deionized water solution of expansible graphite and alumina fibre dispersing agent is uniformly first mixed into dispersion, then using true
Empty pump filters molding method and prepares expansible graphite-alumina composite material precast body, then multiple precast bodies are superimposed and are suppressed
Dry method prepares expansible graphite-alumina composite expandable material.The present invention has with short production cycle (generally one
It), simple process, advantage at low cost, it is easy to accomplish mechanization large-scale production.The expandable material tool prepared with this method
There is the advantages of high temperature lower volume rapid, high volume expansion, volume expansion amount is higher than when initial expansion temperature is lower than 400 DEG C, 900 DEG C
300%, and the material after expanding has certain heat-proof quality again, 1100 DEG C of thermal coefficients are lower than 0.120W/mK, under room temperature
Compressive strength is higher than 0.1MPa when 10% decrement.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the vacuum filtration enrichment facility in the embodiment of the present invention.
Specific embodiment
Present invention is further described in detail combined with specific embodiments below, but not as a limitation of the invention.In
In following the description, what different " embodiment " or " embodiment " referred to is not necessarily the same embodiment.In addition, one or more are implemented
Special characteristic, structure or feature in example can be combined by any suitable form.
Embodiment 1
First will 0.02kg polyacrylamide be added 100kg deionized water in, be sufficiently stirred to be formed dispersing agent go from
Sub- aqueous solution adds the expansible graphite of 4kg and the alumina fibre of 96kg, stirs evenly, obtains raw material slurry；Wherein may be used
The carbon mass percentage of expanded graphite is 90%, expansion multiplying power 210ml/g, mesh number 50, pH 5.4；Alumina fibre
Density is 2.9g/cm3, diameter is 10 μm, length 3mm, and the mass percentage of aluminium oxide is 96.2%.
The raw material slurry of acquisition is added in vacuum filtration enrichment facility shown in FIG. 1, starting vacuum pump filter dense
Contracting, partial moisture is discharged in raw material slurry, controls in slurry solid phase mass percentage in 0.05-30% to get to can be swollen
Swollen graphite-alumina composite preform；As shown in Figure 1, vacuum filtration enrichment facility includes feed well 1, blow tank 2 and true
Sky pump 3, feed well 1 is located on blow tank 2 and is interconnected, and blow tank 2 connects vacuum pump 3, is equipped with filter inside feed well 1
Net 4 is laid with one layer of filter paper 5 on strainer 4.Filter paper 5 uses non-woven fabrics or microporous fibre paper；It is specific as follows that step is filtered by vacuum: first
By the uniform spreading of raw material slurry 6 on the filter paper 5 in feed well 1, start vacuum pump 3, the partial moisture in raw material slurry 6 penetrates
Filter paper 5 and strainer 4 are drained into blow tank 2, obtain expansible graphite-alumina composite material precast body, and solid concentration can be with
It is controlled by filtering time and vacuum degree, vacuum degree is between -0.05-0.095MPa.
As required, 2-10 or more expansible graphites-alumina composite material precast body are passed through into phosphate glue
Then bonding superposition adjusts density using metal splint method and carries out pressure filtration molding, then constant pressure and dry to get inflatable stone is arrived
Ink-alumina fibre expandable material.Wherein metal splint method specifically: the equal metal clip of two pieces of thickness, side lengths of setting
Plate, metal splint are equipped with several bolts hole, and multiple expansible graphite-alumina composite materials being superimposed by binder are pre-
Body processed is placed between two pieces of metal splints, and two pieces of metal splints are fixed with bolt, and the tightness by adjusting metal nuts is adjusted
Expansible graphite-alumina composite material precast body density；It sets precast body and density is adjusted as 0.10-1.00g/cm3.It is dry
Dry condition is drying 2-20 hours at 120 DEG C, controls the moisture content in expandable material in 0.1-10wt% or less.
Embodiment 2
The present embodiment is that the polyacrylamide of 0.023kg is added in the deionized water of 100kg with 1 difference of embodiment；
Expansible graphite 4.5kg, alumina fibre 95.5kg；Wherein the carbon mass percentage of expansible graphite is 91.5%, expansion
Multiplying power 235ml/g, mesh number 50, pH 4.7；The density of alumina fibre is 2.7g/cm3, diameter is 8 μm, length 4mm,
The mass percentage of aluminium oxide is 98.3%；Binder selects Aluminum sol.
Embodiment 3
The present embodiment is that the polyacrylamide of 0.031kg is added in the deionized water of 100kg with 1 difference of embodiment；
Expansible graphite 4.6kg, alumina fibre 95.4kg；Wherein the carbon mass percentage of expansible graphite is 89.5%, expansion
Multiplying power 200ml/g, mesh number 30, pH 6；The density of alumina fibre is 2.6g/cm3, diameter is 8 μm, length 2mm, oxygen
The mass percentage for changing aluminium is 97.5%.
Embodiment 4
The present embodiment is that the polyacrylamide of 0.019kg is added in the deionized water of 100kg with 1 difference of embodiment；
Expansible graphite 5.5kg, alumina fibre 94.5kg；Wherein the carbon mass percentage of expansible graphite is 94%, expansion times
Rate 260ml/g, mesh number 30, pH 3.9；The density of alumina fibre is 2.5g/cm3, diameter is 7 μm, length 4mm, oxygen
The mass percentage for changing aluminium is 99%.
Embodiment 5
The present embodiment is that the polyacrylamide of 0.024kg is added in the deionized water of 100kg with 1 difference of embodiment；
Expansible graphite 4.0kg, alumina fibre 96.0kg；Wherein the carbon mass percentage of expansible graphite is 95%, expansion times
Rate 280ml/g, mesh number 80, pH 4.5；The density of alumina fibre is 2.7g/cm3, diameter is 6 μm, length 4mm, oxygen
The mass percentage for changing aluminium is 95.9%.
Embodiment 6
The present embodiment is that the polyacrylamide of 0.021kg is added in the deionized water of 100kg with 1 difference of embodiment；
Expansible graphite 5.1kg, alumina fibre 94.9kg；Wherein the carbon mass percentage of expansible graphite is 92.4%, expansion
Multiplying power 225ml/g, mesh number 50, pH 5.6；The density of alumina fibre is 2.8g/cm3, diameter is 9 μm, length 5mm,
The mass percentage of aluminium oxide is 96.3%.
Above-described embodiment is only preferable example, however not excluded that not most selection.As dispersing agent selects dispersion effect preferably poly-
Acrylamide, it is not excluded that other dispersing agents.The dosage of deionized water is generally possible to sufficiently soak main material.The present invention
In embodiment, the mass ratio of deionized water and main material (alumina fibre adds expansible graphite) are 1:1.
The intercalation compound of expansible graphite starts to decompose when being heated and reaching certain temperature, generates bulk gas, these
Gas, which is pressurized, generates very big thrust, and its carbon-coating expands outward due to by the thrust, and volume increases, to play expansion
Effect.And alumina fibre in high temperature fibrous insulating material since small with thermal coefficient, thermal capacity is big, at low cost etc. excellent
Point.The two has been implemented in combination with intumescent filler and heat-insulated effect.
Physical parameter, expansion character and the heat-proof quality for the expandable material that embodiment 1-6 is obtained are referring to GB/
T17911.3-1999 refractory ceramic fibre product volume density test method, GB/10698-89 expansible graphite allowance for expansion
Test method, YB/T4130-2005 water flow flat band method, specific test result see the table below 1.
Table 1
As can be seen from Table 1, the expandable material of the embodiment of the present invention can largely expand rapidly in high temperature lower volume, swollen
Bulk increases with temperature and is increased, and range is between 250%-350%.And the material obtained after expanding has certain thermal insulation
Can, density 0.10-1.00g/cm3, there is lower thermal coefficient, thermal coefficient is less than 0.120W/mK at 1100 DEG C, high
Warm heat-proof quality is good；In addition, also having certain mechanical properties, in 10% decrement, compression strength is greater than 0.1MPa.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (7)
1. a kind of preparation method of expandable material, it is characterised in that: include the following steps,
Raw material slurry is filtered by vacuum, expansible graphite-alumina composite material precast body is obtained；
It needs, multiple expansible graphites-alumina composite material precast body is superimposed by binder, using metal according to design
Splinting approach adjusts density and carries out pressure filtration molding, then constant pressure and dry, and obtaining expansible graphite-alumina fibre may expand material
Material,
Wherein the vacuum filtration uses Vacuum filtration device, the Vacuum filtration device include feed well, blow tank and
Vacuum pump, the feed well are located on blow tank and are interconnected, the blow tank connection vacuum pump, in feed well
Portion is equipped with strainer, is laid with one layer of filter paper on strainer；
The group of the following parts by weight of the raw material of the expandable material is grouped as:
Alumina fibre 94-96 parts by weight,
Expansible graphite 4-6 parts by weight,
The expansible graphite partial size is 30-100 mesh, and expansion multiplying power 100-300ml/g, phosphorus content 85-95%, pH value is
3-7；
The alumina fibre is chopped strand or long fibre, and the mass percentage of aluminium oxide is greater than 95%, and density is greater than
2.5g/cm3, diameter is 1-10 μm, and length is less than or equal to 20mm；
The raw material slurry are as follows: dispersing agent is added in deionized water, is sufficiently stirred, add the expansible graphite and
Alumina fibre stirs evenly, and obtains raw material slurry.
2. preparation method according to claim 1, it is characterised in that:
The filter paper uses non-woven fabrics or microporous fibre paper.
3. preparation method according to claim 1, it is characterised in that:
The dispersing agent is polyacrylamide.
4. preparation method according to claim 1, it is characterised in that:
The polyacrylamide of 0.01-0.05 parts by weight is added in the deionized water of 100 parts by weight, is sufficiently stirred, adds institute
The expansible graphite and alumina fibre stated, stir evenly, obtain raw material slurry.
5. preparation method according to claim 1, it is characterised in that:
Raw material slurry is filtered by vacuum, until the mass percent concentration of solid phase reaches 0.05-30% in raw material slurry, may expand
Graphite-alumina composite preform,
The binder is inorganic glue resistant to high temperature, and the inorganic glue resistant to high temperature includes phosphate glue and Aluminum sol.
6. preparation method according to claim 1, it is characterised in that:
The metal splint method specifically: the equal metal splint of two pieces of thickness, side lengths of setting, metal splint are equipped with several
Multiple expansible graphite-alumina composite material precast bodies being superimposed by binder are placed in two pieces of metal splints by bolt hole
Between, two pieces of metal splints are fixed with bolt, the tightness by adjusting metal nuts adjusts expansible graphite-alumina composite
The density of prefabricated body；It sets precast body and density is adjusted as 0.10-1.00g/cm3。
7. preparation method according to claim 1, it is characterised in that:
The vacuum degree of the vacuum filtration is between-0.05-0.095MPa.
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| CN201710784671.5A CN107500797B (en) | 2014-12-24 | 2014-12-24 | It is adaptive to block heat-barrier material and preparation method thereof |
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| CN201410818267.1A CN104591765B (en) | 2014-12-24 | 2014-12-24 | A kind of expandable material and preparation method thereof |
| CN201710784671.5A CN107500797B (en) | 2014-12-24 | 2014-12-24 | It is adaptive to block heat-barrier material and preparation method thereof |
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| CN107500711B (en) * | 2014-12-24 | 2019-09-10 | 中国建筑材料科学研究总院 | Engine expansion plugging heat-barrier material |
| CN108006045A (en) * | 2017-11-29 | 2018-05-08 | 芜湖强振汽车紧固件有限公司 | A kind of thermostable double end self-locking screw |
| CN108793887B (en) * | 2018-07-26 | 2020-12-22 | 上海石化安东混凝土有限公司 | Large-volume concrete and preparation method thereof |
| CN112661527B (en) * | 2020-12-18 | 2022-09-30 | 山东鲁阳浩特高技术纤维有限公司 | Expandable alumina-based fiber module and preparation method thereof |
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| CN1861901A (en) * | 2006-06-16 | 2006-11-15 | 中国建筑材料科学研究总院 | High temp. resisting low thermoconducting flexible ceramics fibre composite paper and its making method |
| CN103626472A (en) * | 2013-12-10 | 2014-03-12 | 中国建筑材料科学研究总院 | Ultra-high-temperature heat-insulating material and preparation method thereof |
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| US6913059B2 (en) * | 2002-05-13 | 2005-07-05 | Industrial Ceramic Solutions | Ceramic fiber-based filter web and method |
| CN1849422A (en) * | 2003-09-02 | 2006-10-18 | 名古屋油化株式会社 | Flame-retardant sheet and formed article therefrom |
| DE502004005321D1 (en) * | 2004-04-16 | 2007-12-06 | Sgl Carbon Ag | Process for the production of expanded graphite moldings |
| CN201046357Y (en) * | 2007-04-24 | 2008-04-16 | 宝山钢铁股份有限公司 | A vacuum suction device |
| CN103466998B (en) * | 2013-09-16 | 2016-02-17 | 成都亚恩科技实业有限公司 | A kind of Carbon aerogel thermal insulation material and preparation method thereof |
| CN107500711B (en) * | 2014-12-24 | 2019-09-10 | 中国建筑材料科学研究总院 | Engine expansion plugging heat-barrier material |
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| CN107500797A (en) | 2017-12-22 |
| CN107500711A (en) | 2017-12-22 |
| CN107500711B (en) | 2019-09-10 |
| CN104591765B (en) | 2017-10-13 |
| CN104591765A (en) | 2015-05-06 |
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