Self-propagating high temperature-synthesis of Si3N4:: role of ammonium salt addition

被引：58

作者：

Cano, IG ^{[1
]}

Baelo, SP ^{[1
]}

Rodríguez, MA ^{[1
]}

de Aza, S ^{[1
]}

机构：

[1] CSIC, Inst Ceram & Vidrio, Madrid 28500, Spain

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2001年 / 21卷 / 03期

关键词：

powders-solid state reaction; SHS; Si3N4; whiskers;

D O I：

10.1016/S0955-2219(00)00168-0

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：

This paper presents results of combustion synthesis (SHS) of Si3N4 from silicon powders under nitrogen pressure (P-nitrogen = 10 MPa). The role of different additives, such as NH4Cl, NH4F. NH4CO2NH2, (NH4)(2) C2O4H2O. NH3 CO3H + NH2COONH4, on Si3N4 synthesis has been examined. Density and microstructural variations have been studied too. The product as synthesised presents two very different types of morphologies: (1) agglomerated form of alpha -Si3N4 and beta -Si3N4 and (2) irregular formations with presence of oxynitrides and other phases. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：291 / 295

页数：5

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