Manufacture method of silicon carbide refractory ceramics material

A technology of refractory ceramics and silicon carbide, which is applied in the field of preparation of silicon carbide refractory ceramics, can solve problems such as solid solution reaction of products with low relative density and low compressive strength

Inactive Publication Date: 2007-02-28
QINGDAO UNIV
View PDF13 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of the invention needs to be further improved for the relative density of the product caused by the carbotherm

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

[0019]Select first-grade Suzhou kaolin and industrial carbon black, adjust the silicon / aluminum ratio with fused silica powder according to the chemical composition analysis results to achieve a Z value of 1, the weight percentage of silicon-aluminum raw material and carbon black is 1:0.25, and then add 1wt% Vanadium oxide, mix it evenly and treat it at 500°C for two hours to form the matrix material. Then green SiC granules with particle size of 40#, 80# and 240# are mixed according to the ratio of 6.5:1.5:2, wherein the raw material for forming the Sialon matrix phase and SiC are mixed again according to the weight ratio of 2:8, and organic After the binder is formed, it is pressed and molded, and the temperature is slowly raised and sintered in a flowing nitrogen atmosphere for 72 hours, and the maximum temperature is 1550°C for 16 hours at a constant temperature. Cooling yields a Sialon bonded SiC article with a Z value of 1. According to X-ray diffraction phase analysis,...

Embodiment 2

[0021] Select first-grade Suzhou kaolin, fine and pure coal powder, adjust the silicon / aluminum ratio with fused silica powder according to the chemical composition analysis results to reach the Z value of 2, the weight percentage of silicon-aluminum raw material and coal powder is 1:0.25, and then add 1wt % yttrium oxide, mix it evenly and treat it at 550°C for two hours to form the matrix raw material. Then green SiC pellets of 60#, 100# and 240# are mixed in a ratio of 6:2:2, wherein the raw material for forming the β-Sialon matrix phase and SiC are mixed again in a weight ratio of 2.5:7.5, and After adding an organic molding binder, it is pressed and molded, and the temperature is slowly raised and sintered in a flowing nitrogen atmosphere for 90 hours, and the maximum temperature is 1580°C for 20 hours at a constant temperature. After cooling, a β-Sialon bonded SiC product with a Z value of 2 was obtained. According to X-ray diffraction phase analysis, its main crystal p...

Embodiment 3

[0023] Select first-grade Suzhou kaolin and coke gemstones, fine graphite powder, adjust the silicon / aluminum ratio with fused silica powder according to the chemical composition analysis results to reach the Z value of 2.5, and the weight percentage of silicon-aluminum raw material and graphite powder is 1:0.28, and then Add 1wt% yttrium oxide and 0.5% vanadium oxide, mix them uniformly and treat them at 600° C. for four hours to form matrix raw materials. Then green SiC pellets of 60#, 100# and 240# are mixed in a ratio of 6:1:3, wherein the raw material for forming the β-Sialon matrix phase and SiC are mixed again in a weight ratio of 2.5:7.5, and After adding an organic molding binder, it is pressed and molded, and the temperature is slowly raised and sintered in a flowing nitrogen atmosphere for 100 hours, and the maximum temperature is 1600°C for 15 hours at a constant temperature. After cooling, a β-Sialon bonded SiC article with a Z value of 2.5 was obtained. Accordin...

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

No PUM Login to view more

Abstract

The invention discloses a preparing method of carbofrax fireproof ceramic material combined by beta-Sialon host phase, which comprises the following steps: adopting predisposal clay mineral raw material, industrial carbon powder and gas with nitrogen as main raw material to form beta-sialon hose combining phase; adding reacting accelerating addictive; adding different particle grades to allocate SiC particle; blending evenly with organic adhesive; moulding biscuit through ceramic moulding method; drying; loading in the high-temperature kiln-furnace with nitrogen; setting the reacting temperature under 1300-1550 deg.c for 3-36h; proceeding carbon heat-nitrogenizing reaction; setting each reacting sintering period at 10-100h; synthesizing the product.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of special refractory ceramic materials in material science, and relates to a preparation method of a silicon carbide (SiC) refractory ceramic material combined with a beta-Sialon (β-Sialon) matrix by using a cheap mineral raw material carbon thermal reduction nitriding reaction. technical background: [0002] Beta Sialon (β-Sialon) was originally researched and developed as a high-temperature engineering ceramic material. Its preparation methods mainly include silicon powder, aluminum powder and alumina powder or only silicon powder and aluminum powder as raw materials. Nitriding reaction sintering synthesis method. The products of this kind of method have excellent performances such as molding, processability and high temperature resistance, and can be applied to various application occasions. Many researchers have developed SiC as a combined refractory material and applied for several pat...

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): C04B35/565C04B35/66C04B35/622
Inventor 隋万美宋然然
Owner QINGDAO UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap