Unlock instant, AI-driven research and patent intelligence for your innovation.

Silicon carbide ceramic containing aluminum oxide dispersion embedded particles with multiple characters and appearances

A technology of alumina and flaky alumina, which is applied in the field of silicon carbide ceramics and ceramics, can solve the problems of high raw material costs, rising costs, and affecting the quality uniformity of toughened silicon carbide ceramics, and achieve low-cost effects

Inactive Publication Date: 2010-09-01
NINGBO UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010]Toughened silicon carbide ceramics containing silicon carbide whiskers or carbon fibers are indeed a type of silicon carbide ceramics with higher toughness, but, due to the silicon carbide contained in them The high cost of whisker raw materials increases the cost of the entire toughened ceramic product. In addition, this type of toughened silicon carbide ceramics also has a problem, that is, in its manufacturing process, silicon carbide with a high aspect ratio Whiskers and carbon fibers are generally difficult to mix evenly with other raw materials for the production of silicon carbide ceramics, which to a certain extent affects the quality uniformity of the corresponding toughened silicon carbide ceramic products

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

[0026] Example 1, one of the preparation methods of silicon carbide ceramics containing dispersed and embedded particles of aluminum oxide with various characteristic shapes: 0.5%-3.0% (weight) of C-B sintering aids, and 2.0%-10.0% (weight) of Flaky alumina particles, and 2.0% to 10.0% by weight of rod-shaped alumina particles, and 2.0% to 3.0% by weight of spherical alumina particles, and 84.0% to 93.5% by weight of carbonized Silica powder, and an appropriate amount of PVA (polyvinyl alcohol), are mixed by dry ball milling, molded, cured at a temperature range of 100°C-300°C, and then sintered at a temperature range of 1700°C-2100°C for 0.5-3.0 hours to produce Silicon carbide ceramics containing dispersed and embedded particles of alumina with various characteristic morphologies.

[0027] Among them, the preparation technology or customized products of flaky alumina particles, rod-shaped alumina particles and spherical alumina particles can be provided by the High-tech Indu...

Embodiment 2

[0028] Example 2, the second preparation method of silicon carbide ceramics containing dispersed and embedded particles of aluminum oxide with various characteristic shapes: 0.5%-3.0% (weight) of C-B sintering aid, and 2.0%-10.0% (weight) of Flaky alumina particles, and 2.0% to 10.0% by weight of rod-shaped alumina particles, and 2.0% to 3.0% by weight of spherical alumina particles, and 84.0% to 93.5% by weight of carbonized Silica powder, and an appropriate amount of PVA (polyvinyl alcohol), and an appropriate amount of water are made into a slurry material, mixed by wet ball milling, dried, granulated, molded, and cured at a temperature range of 100°C-300°C , and then sintering at a temperature range of 1700°C-2100°C for 0.5-3.0 hours to produce silicon carbide ceramics containing dispersed embedded particles of aluminum oxide with various characteristic morphologies.

[0029] Among them, the preparation technology of the flaky alumina particles, the rod-shaped alumina part...

Embodiment 3

[0030] Example 3, the third preparation method of silicon carbide ceramics containing dispersed and embedded particles of aluminum oxide with various characteristic shapes: 0.5%-3.0% (weight) of C-B sintering aid, and 2.0%-10.0% (weight) of Flaky alumina particles, and 2.0% to 10.0% by weight of rod-shaped alumina particles, and 2.0% to 3.0% by weight of spherical alumina particles, and 84.0% to 93.5% by weight of carbonized Silica powder, and an appropriate amount of PVA (polyvinyl alcohol), and an appropriate amount of water, are made into a slurry material, mechanically stirred and mixed, and ultrasonic waves are applied to the slurry material at the same time. After such treatment, it is dried and granulated. Molding, curing at a temperature range of 100°C-300°C, and then sintering at a temperature range of 1700°C-2100°C for 0.5-3.0 hours to produce silicon carbide ceramics containing dispersed embedded particles of alumina with various characteristic shapes.

[0031] Amon...

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 present invention relates to silicon carbide ceramic, and is especially technological scheme of one kind of silicon carbide ceramic containing dispersive embedded alumina grains in different characteristic forms as the toughening material. Granular alumina material is inexpensive and easy to be mixed with other ceramic material, so that the toughened silicon carbide ceramic has relatively lowcost and high homogeneity. At the same time, the silicon carbide ceramic has thermal expansion mismatching utilized to induce micro crack, crack deflection, crack bridging, drawing-out effect, crystal grain fining and other beneficial toughening factors.

Description

technical field [0001] The invention relates to a ceramic, in particular to a silicon carbide ceramic, in particular to a silicon carbide ceramic containing dispersed and embedded particles of aluminum oxide with various characteristic shapes. Background technique [0002] The toughened silicon carbide ceramics reported so far are mostly toughened silicon carbide ceramics containing silicon carbide whiskers or carbon fibers. For reports on toughened silicon carbide ceramics containing silicon carbide whiskers, see: Invention (design) by Tian Jiemo et al., Tsinghua University application, application number CN91101684.8 Patent Application "Whisker Toughened and Strengthened Carbon Ceramic Composite Material"; and , invented (designed) by Alexander J. Pazik, applied by Tang Chemical Material Co., Ltd., application number is CN90110427.2 patent application "silicon carbide whisker reinforced ceramic composite material and its manufacturing method"; and, Cheng Lai Invented (des...

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): C04B35/565C04B35/80
Inventor 李榕生水淼王霞宋岳
Owner NINGBO UNIV