Synthesis of well-dispersed β-Si3N4 with equiaxed structures using carbothermal reduction-nitridation method

被引：11
|
作者：
Sun, Si-Yuan [1 ]
Ge, Yi-Yao [1 ]
Tian, Zhao-Bo [1 ]
Zhang, Jie [1 ]
Chen, Ke-Xin [1 ]
Xie, Zhi-peng [1 ]
机构：
[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing, Peoples R China
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2017年 / 100卷 / 12期
关键词：
powders; silicon nitride; thermal conductivity; THERMAL-CONDUCTIVITY; SI3N4;
D O I：
10.1111/jace.15078
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：
Well-dispersed beta-Si3N4 powders with a novel equiaxed structure and eminent crystal integrity were prepared by carbothermal reduction-nitridation (CRN) strategy with the assistance of CaF2 additive. The growth mechanism of Si3N4 particles in the CRN process was elucidated. It is proposed that the liquid phase formed by SiO2 and CaF2 additive is crucial to the formation of equiaxed beta-Si3N4, and with an appropriate content of CaF2, Si3N4 powders with pure beta phase, superior dispersity and crystal integrity can be obtained.
引用
收藏
页码：5363 / 5366
页数：4
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