CN107344865A - The preparation method of heat transfer anisotropic ceramics material - Google Patents
The preparation method of heat transfer anisotropic ceramics material Download PDFInfo
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- CN107344865A CN107344865A CN201710454389.0A CN201710454389A CN107344865A CN 107344865 A CN107344865 A CN 107344865A CN 201710454389 A CN201710454389 A CN 201710454389A CN 107344865 A CN107344865 A CN 107344865A
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- heat transfer
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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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/067—Macromolecular compounds
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
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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
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63444—Nitrogen-containing polymers, e.g. polyacrylamides, polyacrylonitriles, polyvinylpyrrolidone [PVP], polyethylenimine [PEI]
Abstract
The invention discloses a kind of preparation method of heat transfer anisotropic ceramics material.The web of X/Y plane laying is prepared first, or X or the fiber of Y-direction laying, Fiber Materials are the material that high temperature can remove；Then ceramic material slurry is prepared, by injection molding, slurry solidification, the demoulding, dry, biscuiting, porous ceramic film material is prepared by the method for pressureless sintering.The ceramic material of preparation there are the stomata of insertion in X/Y plane or X or Y-direction, and ceramic material has differences on X/Y plane or X or Y-direction with the pyroconductivity of Z-direction.In addition, the inventive method technique is simple and environmentally-friendly, suitable for large-scale industrial production.
Description
Technical field
The present invention relates to a kind of preparation method of thermal conductivity anisotropic ceramics material；Specifically refer in X-axis or Y-axis
Or there is the ceramic material of larger difference in the thermal conductivity and Z axis of XY axles.
Background technology
The anisotropy of material refers to：Material has different performance indications in two mutually perpendicular directions.So
More materials are significantly different in the tensile strength laterally and longitudinally in both direction.
Common anisotropic material has bamboo, timber, fiberboard, phenolic laminated sheet, epoxy glass fabric rod, resin+nothing
The offhand such as alkali cloth material, silicon steel sheet etc..In addition to the monocrystalline of Emission in Cubic, the monocrystalline of remaining crystallographic system is all shown more or less
Anisotropy.
But ceramic material due to be many little crystal grains composition dense material, so being each to same in performance macroscopically
Property.
Need rapidly to reduce thermograde in some occasions, such as in the local temperature for having comparison high, this is to need
The one side of contact high temperature has higher temperature diffusivity, and heat is run through into planar diffusion in contact point goes out, while
Local thermal conductivity away from high temperature is relatively low, can reduce the temperature of material surface.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of preparation method of heat transfer anisotropic ceramics material.Institute
The ceramic material stated there are the stomata of insertion in X/Y plane or X or Y-direction, and ceramic material is in X/Y plane or X or Y-direction
On pyroconductivity and had differences in the pyroconductivity of Z-direction.
To solve above technical problem, the present invention is adopted the following technical scheme that：
The present invention relates to a kind of preparation method of heat transfer anisotropic ceramics material, methods described comprises the following steps：
S1, the web for preparing X/Y plane laying, or X or the filament of Y-direction laying, Fiber Materials are that high temperature can be with
The material of removal；
S2, ceramic powder is scattered in deionized water, adds dispersant, prepare slurry；Add propylene in the slurry again
Amide monomer and the double Methacrylamides of NN-, after mixing 2~4h, after adding initiator, catalyst, obtain ceramic slurry；
Import and laid in web or filametntary mould after S3, the ceramic slurry degasification, treat that first layer slurry coagulates
After Gu, then web or silk are laid, then pour into a mould the second layer；Gradually pour into a mould, until filling mould；
S4, by being stripped, drying, biscuiting, porous ceramic film material is prepared by the method for pressureless sintering, i.e., described heat transfer
Anisotropic ceramics material.
Preferably, in step S2, the weight ratio of the ceramic powder and deionized water is 1: 0.5~2, and stirring is extremely into uniform
Fig. 5.
Preferably, in step S2, the dispersant is ammonium polyacrylate；The dosage of the dispersant is ceramic powder quality
2~3%.
Preferably, in step S2, the initiator is ammonium persulfate or potassium peroxydisulfate；The catalyst is tetramethyl second
Diamines.In the system of the present invention, only coordinate specific dispersant, initiator and catalyst, the heat of the present invention could be realized
Conduct the preparation of anisotropic ceramics material.
Preferably, in step S2, the double Methacrylamides of the ceramic powder, acrylamide monomer, NN-, initiator and
The mass ratio of catalyst is 1: 0.03~0.05: 0.0003~0.0005: 0.0003~0.0005: 0.0003~0.0005.
In the system of the present invention, the dosage of above-mentioned each component higher or lower than defined above, will all to be made in X/Y plane or
Person X or Y-direction there are the stomata of insertion, and the pyroconductivity on X/Y plane or X or Y-direction and the heat in Z-direction
The ceramic material that conductivity has differences.
Preferably, in step S3, the heating-up temperature used that solidifies is 40~60 DEG C.
Preferably, the heat transfer anisotropic ceramics material there are insertion in X/Y plane or X or Y-direction
Stomata, pyroconductivity of the ceramic material on X/Y plane or X or Y-direction and has differences in the pyroconductivity of Z-direction.
Compared with prior art, the present invention has the advantages that：
1st, the ceramic material being prepared there are the stomata of insertion in X/Y plane or X or Y-direction, and ceramic material is in XY
Larger difference be present in plane or X or pyroconductivity in Y-direction and the pyroconductivity of Z-direction.
2nd, the inventive method technique is simple and environmentally-friendly, suitable for large-scale industrial production.
Brief description of the drawings
The detailed description made by reading with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is that X/Y plane lays fibrous layer schematic diagram；
Fig. 2 is X or Y-direction lays fibrous layer schematic diagram.
Embodiment
With reference to embodiment, the present invention is described in detail.Following examples will be helpful to those skilled in the art
The present invention is further understood, but the invention is not limited in any way.It should be pointed out that to one of ordinary skill in the art
For, without departing from the inventive concept of the premise, it can also make certain adjustments and improvements.These belong to the guarantor of the present invention
Protect scope.
Embodiment 1
The present embodiment provides a kind of preparation method of heat transfer anisotropic ceramics material, and it specifically comprises the following steps：
1st, the web (such as Fig. 1) of X/Y plane laying is prepared, Fiber Materials are nylon；
2nd, Silicon Nitride is prepared, first disperses beta-silicon nitride powder in deionized water, dispersant is added, prepares silicon nitride
The weight ratio of slurry, beta-silicon nitride powder and water is 1: 0.5, and stirring is extremely into uniform pulpous state.Using ammonium polyacrylate as scattered
Agent (2wt%).
3rd, acrylamide monomer and the double Methacrylamides (3wt%) of NN- are added in Silicon Nitride, after mixing 2h,
Initiator, catalyst etc. are added, Silicon Nitride degasification, Silicon Nitride is imported to the mould containing laying web or silk
In, after the solidification of first layer slurry, then laying web or silk are laid, then the second layer is poured into a mould, gradually pour into a mould, until filling mould
Tool.At 60 DEG C or so, slurry solidifies the heating-up temperature of gel solidification.By being stripped, drying, biscuiting, pass through the side of pressureless sintering
Method prepares porous ceramic film material.
The silicon nitride material of preparation there are the stomata of insertion in X/Y plane, and ceramic material is in X/Y plane and Z-direction
Thermal conductivity difference ＞ 200%.
Embodiment 2
The present embodiment provides a kind of preparation method of heat transfer anisotropic ceramics material, and it specifically comprises the following steps：
1st, the fiber (see Fig. 2) of X-direction laying is prepared, Fiber Materials are nylon；
2nd, Silicon Nitride is prepared, first disperses beta-silicon nitride powder in deionized water, dispersant is added, prepares silicon nitride
The weight ratio of slurry, beta-silicon nitride powder and water is 1: 1, and stirring is extremely into uniform pulpous state.Using ammonium polyacrylate as dispersant
(2wt%).
3rd, acrylamide monomer and the double Methacrylamides (3wt%) of NN- are added in Silicon Nitride, after mixing 2h,
Initiator, catalyst etc. are added, Silicon Nitride degasification, Silicon Nitride is imported to the mould containing laying web or silk
In, after the solidification of first layer slurry, then laying web or silk are laid, then the second layer is poured into a mould, gradually pour into a mould, until filling mould
Tool.At 50 DEG C or so, slurry solidifies the heating-up temperature of gel solidification.By being stripped, drying, biscuiting, pass through the side of pressureless sintering
Method prepares porous ceramic film material.
The silicon nitride material of preparation is having the stomata of insertion in X-direction, and ceramic material is in X-direction and Y, the heat of Z-direction
Conductance difference ＞ 150%.
Embodiment 3
The present embodiment provides a kind of preparation method of heat transfer anisotropic ceramics material, and it specifically comprises the following steps：
1st, the fiber (see Fig. 2) of Y-direction laying is prepared, Fiber Materials are nylon；
2nd, Silicon Nitride is prepared, first disperses beta-silicon nitride powder in deionized water, dispersant is added, prepares silicon nitride
The weight ratio of slurry, beta-silicon nitride powder and water is 1: 2, and stirring is extremely into uniform pulpous state.Using ammonium polyacrylate as dispersant
(2wt%).
3rd, acrylamide monomer and the double Methacrylamides (3wt%) of NN- are added in Silicon Nitride, after mixing 2h,
Initiator, catalyst etc. are added, Silicon Nitride degasification, Silicon Nitride is imported to the mould containing laying web or silk
In, after the solidification of first layer slurry, then laying web or silk are laid, then the second layer is poured into a mould, gradually pour into a mould, until filling mould
Tool.At 40 DEG C or so, slurry solidifies the heating-up temperature of gel solidification.By being stripped, drying, biscuiting, pass through the side of pressureless sintering
Method prepares porous ceramic film material.
The silicon nitride material of preparation there are the stomata of insertion in the Y direction, and ceramic material is in Y plane and the heat of Z-direction
Conductance difference ＞ 150%.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (7)
1. a kind of preparation method of heat transfer anisotropic ceramics material, it is characterised in that methods described comprises the following steps：
S1, the web for preparing X/Y plane laying, or X or the filament of Y-direction laying, Fiber Materials are that high temperature can remove
Material；
S2, ceramic powder is scattered in deionized water, adds dispersant, prepare slurry；Add acrylamide in the slurry again
Monomer and the double Methacrylamides of NN-, after mixing 2~4h, after adding initiator, catalyst, obtain ceramic slurry；
Import and laid in web or filametntary mould after S3, the ceramic slurry degasification, after the solidification of first layer slurry,
Web or silk are laid again, then pour into a mould the second layer；Gradually pour into a mould, until filling mould；
S4, by being stripped, drying, biscuiting, porous ceramic film material is prepared by the method for pressureless sintering, i.e., described heat transfer respectively to
Different in nature ceramic material.
2. the preparation method of heat transfer anisotropic ceramics material according to claim 1, it is characterised in that step S2
In, the weight ratio of the ceramic powder and deionized water is 1: 0.5~2, and stirring is extremely into uniform pulpous state.
3. the preparation method of heat transfer anisotropic ceramics material according to claim 1, it is characterised in that step S2
In, the dispersant is ammonium polyacrylate；The dosage of the dispersant is the 2~3% of ceramic powder quality.
4. the preparation method of heat transfer anisotropic ceramics material according to claim 1, it is characterised in that step S2
In, the initiator is ammonium persulfate or potassium peroxydisulfate；The catalyst is tetramethylethylenediamine.
5. the preparation method of heat transfer anisotropic ceramics material according to claim 1, it is characterised in that step S2
In, the mass ratio of the ceramic powder, acrylamide monomer, NN- double Methacrylamides, initiator and catalyst is 1: 0.03
~0.05: 0.0003~0.0005: 0.0003~0.0005: 0.0003~0.0005.
6. the preparation method of heat transfer anisotropic ceramics material according to claim 1, it is characterised in that step S3
In, the heating-up temperature used that solidifies is 40~60 DEG C.
7. the preparation method of heat transfer anisotropic ceramics material according to claim 1, it is characterised in that described
Heat transfer anisotropic ceramics material there are the stomata of insertion in X/Y plane or X or Y-direction, ceramic material in X/Y plane or
Person X or pyroconductivity in Y-direction and had differences in the pyroconductivity of Z-direction.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114502325A (en) * | 2019-10-19 | 2022-05-13 | 株式会社村田制作所 | Clip for chip electronic component |
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