Thermal Conductivity and Mechanical Property of Si3N4 Ceramics Sintered with CeF3/LaF3 Additives

被引：4

作者：

Bing, Bai ^{[1
]}

Fu, Teng ^{[1
]}

Ning, Xiaoshan ^{[1
]}

机构：

[1] Tsinghua Univ, State Key Lab New Ceram & Fine Proc, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

CHINESE CERAMICS COMMUNICATIONS | 2010年 / 105-106卷

关键词：

Si(3)N(4); SPS; thermal conductivity; mechanical property;

D O I：

10.4028/www.scientific.net/AMR.105-106.171

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：

In this paper, rare-earth fluorides were used as sintering additives instead of rare-earth oxides, the influence of the type and the amount of the fluoride on the thermal conductivity, hardness and strength of Si(3)N(4) ceramics was studied. Results show that the thermal conductivity of a sample sintered with CeF(3) is nearly 10% higher than that of the sample sintered with Ce(2)O(3), while the samples sintered with LaF(3) increases further 15% as comparing with the samples sintered with CeF(3). The strength of the samples changes reversely. These results express that the thermal conductivity of Si(3)N(4) ceramics can be improved by using rare-earth fluoride additives instead of the oxides, and the type of rare-earth fluorides has a significant impact on the properties of Si(3)N(4) ceramics.

引用

页码：171 / 174

页数：4

共 6 条

[1]

Haggerty JS., 1995, Ceram Eng Sci Proc, V16, P475

[2] MgSiN2 addition as a means of increasing the thermal conductivity of β-silicon nitride [J].