Injection-molded reactive sintered SiC ceramic material and preparation method thereof

A ceramic material and injection molding technology, which is applied in the field of ceramic injection molding, can solve the problems of reaction sintered SiC ceramic material patents and literature reports, and it takes dozens of hours or even more than 100 hours to achieve easy operation and excellent sintered body performance , high precision effect

Inactive Publication Date: 2015-03-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3. Chinese patent document CN200910090645.8 "A method for manufacturing special-shaped ceramic parts of gears by injection molding", the content (weight ratio) of the organic binder in the ceramic injection mixture is between 10 and 20%, but the degreasing time need

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0062] Example 1:

[0063] An injection molding reaction sintered SiC ceramic material, which is made by mixing, molding, debinding and sintering the following raw materials: 60g D 50 40μm silicon carbide powder, 34g D 50 3μm silicon carbide powder, 6g D 50 It is 1.5μm carbon powder, 2g stearic acid, 15g paraffin, 5g ethylene vinyl acetate copolymer, 5g high density polyethylene.

[0064] The preparation steps are as follows:

[0065] (1) Ingredients and mixing

[0066] Weigh D 50 40μm silicon carbide powder, D 50 3μm silicon carbide powder, charcoal powder, and stearic acid are added as raw materials to 150 parts of ethanol, using silicon carbide balls as the grinding medium, ball milling and mixing for 2 hours to prepare ethanol-based silicon carbide slurry, and then drying treatment, after grinding 200 mesh sieve;

[0067] Put the powder under the sieve with paraffin wax, ethylene vinyl acetate copolymer, and high-density polyethylene into a blender and mix for 1 hour, then add the ...

Example Embodiment

[0075] Example 2:

[0076] An injection molding reaction sintered SiC ceramic material, which is made by mixing, molding, debinding and sintering the following raw materials: 55g D 50 40μm silicon carbide powder, 35g D 50 3μm silicon carbide powder, 10g D 50 It is 1.5μm carbon powder, 3g stearic acid, 10g paraffin wax, 5g polyethylene wax, 5g ethylene vinyl acetate copolymer, 5g high density polyethylene.

[0077] The preparation steps are as follows:

[0078] (1) Ingredients and mixing

[0079] Weigh D 50 40μm silicon carbide powder, D 50 3μm silicon carbide powder, charcoal powder, stearic acid, add 150 parts of ethanol, use silicon carbide balls as grinding media, ball mill and mix for 2 hours to prepare ethanol-based silicon carbide slurry; then dry treatment, after grinding 200 Mesh screen

[0080] Put the powder under the sieve with 10 parts of paraffin wax, 5 parts of polyethylene wax, 5 parts of ethylene vinyl acetate copolymer, and 5 parts of high-density polyethylene into the...

Example Embodiment

[0088] Example 3:

[0089] An injection molding reaction sintered SiC ceramic material, which is made by mixing, molding, debinding and sintering the following raw materials: 60g D 50 40μm silicon carbide powder, 35g D 50 3μm silicon carbide powder, 5g D 50 It is 1.5μm carbon powder, 3g stearic acid, 5g paraffin wax, 10g polyethylene wax, 5g ethylene vinyl acetate copolymer, 5g high density polyethylene.

[0090] The preparation steps are as follows:

[0091] (1) Ingredients and mixing

[0092] Weigh D 50 40μm silicon carbide powder, D 50 3μm silicon carbide powder, carbon powder, and stearic acid are added to 150g of ethanol, using silicon carbide balls as the grinding medium, ball milling and mixing for 2 hours to prepare an ethanol-based silicon carbide slurry; then drying treatment, after grinding, 200 Mesh screen

[0093] Put the powder under the sieve with paraffin wax, polyethylene wax, ethylene vinyl acetate copolymer, and high-density polyethylene into the mixer for mixing. Th...

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Abstract

The invention relates to an injection-molded reactive sintered SiC ceramic material and a preparation method thereof. The ceramic material is prepared from the following raw materials in percentage by mass: 55-80% of silicon carbide, 3-10% of carbon powder, 1-3% of a surfactant, 6-20% of a lubricant and 6-20% of a binder through the steps of mixing, molding, degreasing and sintering, wherein the sum of the amount of components is 100%. The reactive sintered SiC ceramic molded by using the method provided by the invention has the advantages of uniform density of a billet and high dimensional precision, and can be used for manufacturing high-quality ceramic parts with complex structures and no defects. As for the prepared reactive sintered SiC ceramic material, the bulk density is more than 2.7g/cm<3>, and the three-point bending strength can be above 260MPa.

Description

technical field [0001] The invention relates to an injection molding reaction sintered SiC ceramic material and a preparation method thereof, belonging to the field of ceramic injection molding. Background technique [0002] Reaction sintered SiC has the advantages of high thermal conductivity, low thermal expansion coefficient, high strength, near net size sintering and easy preparation of large and complex shape products, and has obvious cost advantages. It is an engineering ceramic material with broad application prospects. Reaction sintered silicon carbide has been widely used in the production of mechanical seals, high temperature valves, heat exchangers, radiant tubes and other products. [0003] At present, the molding methods of reaction sintered silicon carbide ceramics are mainly three basic ceramic molding methods, namely: compression molding, slip casting molding and plastic molding. [0004] Injection molding, also known as injection molding, is a molding metho...

Claims

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Application Information

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IPC IPC(8): C04B35/565C04B35/632C04B35/64
Inventor 张玉军张钊龚红宇李其松余锦程
Owner SHANDONG UNIV
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