Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF5 Cites 22 Cited by
  • 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 needs Dozens of hours or even more than 100 hours;
[0010] However, there are still relatively few domestic researches on ceramic injection molding, and there are no patents and literature reports on preparation of reaction sintered SiC ceramic materials by injection molding.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] An injection molding reaction sintered SiC ceramic material, which is made of the following raw material components through mixing, molding, degreasing and sintering: 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 Add 3 μm silicon carbide micropowder, carbon powder, and stearic acid into 150 parts of ethanol as raw materials, use silicon carbide balls as grinding media, and ball mill and mix for 2 hours to prepare an ethanol-based silicon carbide slurry, which is then dried and ground. 200 mesh sieve;

[0067] Put the sieved powder, paraffin wax, ethylene vinyl acetate copolymer, and high-density polyethylene into a mixer and mix it for 1 hour, then put the mixture into a...

Embodiment 2

[0076] An injection molding reaction sintered SiC ceramic material, which is made of the following raw material components through mixing, molding, degreasing and sintering: 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, and 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 Add 3 μm silicon carbide micropowder, carbon powder, and stearic acid to 150 parts of ethanol, use silicon carbide balls as the grinding medium, and ball mill and mix for 2 hours to prepare an ethanol-based silicon carbide slurry; then dry it, and grind it for 200 Mesh sieve;

[0080] Put the powder under the sieve into the mixer and mix it with 10 parts of paraffin wax, 5 parts of polyethylene wax, 5 parts of ethylene vinyl acetate...

Embodiment 3

[0089] An injection molding reaction sintered SiC ceramic material, which is made of the following raw material components through mixing, molding, degreasing and sintering: 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, and 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 Add silicon carbide micropowder, carbon powder, and stearic acid of 3 μm into 150 g of ethanol, use silicon carbide balls as the grinding medium, and ball mill and mix for 2 hours to prepare an ethanol-based silicon carbide slurry; then dry it, and grind it for 200 Mesh sieve;

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Average densityaaaaaaaaaa
Three-point bending strengthaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com