A COMPARISON OF SOL-GEL DERIVED SILICON-CARBIDE POWDERS FROM SACCHAROSE AND ACTIVATED CARBON

被引：29

作者：

CEROVIC, L

MILONJIC, SK

ZEC, SP

机构：

来源：

CERAMICS INTERNATIONAL | 1995年 / 21卷 / 04期

关键词：

D O I：

10.1016/0272-8842(95)99793-B

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

beta-SiC has been synthetised at 1550 degrees C by the reductive heating of gel precursors prepared from silica sol and saccharose or activated carbon as carbon sources. An optimum molar ratio of reactants, C/SiO2, as well as the mechanism of SiC crystallization, have been investigated for each carbon source applied. The influence of boric acid addition in the starting sol on the properties of SiC powders produced has been elaborated. Boric acid represents a catalyst for the carbothermal reduction of silica within the established range of concentrations which is, in return, dictated by the molar ratio of reactants and carbon source in the system.

引用

页码：271 / 276

页数：6

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