Study on the thermal conductivity of silicon nitride ceramics with magnesia and yttria as sintering additives

被引：24

作者：

Lin, YB ^{[1
]}

Ning, XS ^{[1
]}

Zhou, HP ^{[1
]}

Chen, KX ^{[1
]}

Peng, R ^{[1
]}

Xu, W ^{[1
]}

机构：

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

来源：

MATERIALS LETTERS | 2002年 / 57卷 / 01期

基金：

中国国家自然科学基金;

关键词：

silicon nitride; thermal conductivity; sintering additives; magnesia; yittria;

D O I：

10.1016/S0167-577X(02)00690-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, the thermal conductivity of Si3N4 ceramics sintered with 5 wt.% Y2O3 and different amounts of MgO as additives at different temperatures was studied. Mg5Y6Si5O24 was detected by X-ray diffraction (XRD) and experimental results showed that the amount of Mg5Y6Si5O24 and the thermal conductivity of Si3N4 ceramics were affected by both the sintering temperature and the amount of MgO. The relationship between Mg5Y6Si5O24 and the thermal conductivity of Si3N4 ceramics was discussed. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：15 / 19

页数：5

共 13 条

[1]

Haggerty JS., 1995, Proceedings of the 19th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures-A: Ceramic Engineering and Science Proceedings, P475

[2] High thermal conductivity in silicon nitride with anisotropic microstructure [J].