Thermal conductivity of β-Si3N4:: II, effect of lattice oxygen

被引：199

作者：

Kitayama, M

Hirao, K

Tsuge, A

Watari, K

Toriyama, M

Kanzaki, S

机构：

[1] Fine Ceram Res Assoc, Synergy Ceram Lab, Nagoya, Aichi 4638687, Japan

[2] Natl Ind Res Inst Nagoya, Nagoya, Aichi 4638687, Japan

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2000年 / 83卷 / 08期

关键词：

D O I：

10.1111/j.1151-2916.2000.tb01501.x

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：

Dense beta-Si3N4 with various Y2O3/SiO2 additive ratios were fabricated by hot pressing and subsequent annealing, The thermal conductivity of the sintered bodies increased as the Y2O3/SiO2 ratio increased. The oxygen contents in the beta-Si3N4 crystal lattice of these samples were determined using hot-gas extraction and electron spill resonance techniques. A good correlation between the lattice oxygen content and the thermal resistivity was observed. The relationship between the microstructure, grain-boundary phase, lattice oxygen content, and thermal conductivity of beta-Si3N4 that was sintered at various Y2O3/SiO2 additive ratios has been clarified.

引用

页码：1985 / 1992

页数：8

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