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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

CaO-Y2O3添加剂对AlN陶瓷显微结构及性能的影响

黄小丽1 马庆智1 李发2 刘慧卿2   

  1. 1. 北京信息工程学院, 北京 100101; 2. 北京真空电子技术研究所; 北京 100016
  • 收稿日期:2001-03-12 修回日期:2001-04-16 出版日期:2002-03-20 网络出版日期:2002-03-20

Influence of CaO-Y2O3 as Sintering Aid on the Microstructure and Properties of AlN Ceramics

HUANG Xiao-Li1; MA Qing-Zhi1; LI Fa2; LIU Hui-Qing2   

  1. 1.; Beijing Information Technology Institute Beijing 100101; China; 2. Beijing Vacuum Electronics Research Institute Beijing 100016; China
  • Received:2001-03-12 Revised:2001-04-16 Published:2002-03-20 Online:2002-03-20

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摘要： 研究了掺杂ＣａＯ－Ｙ２Ｏ３热压烧结和常压烧结ＡｌＮ陶瓷的性能和显微结构．结果表明：热压烧结ＡｌＮ陶瓷的第二相为Ｙ３Ａｌ５Ｏ１２，常压烧结ＡｌＮ陶瓷的第二相为Ｙ３Ａｌ５Ｏ１2和Ｃａ３Ｙ２Ｏ６；热压烧结ＡｌＮ的第二相体积百分数和晶格氧含量均低于常压烧结；热压烧结ＡｌＮ陶瓷的微观结构良好，其热导率达到２００Ｗ／ｍ·Ｋ．

关键词: 氮化铝, 氧化钙-氧化钇, 显微结构, 热导率

Abstract: The property and microstructure of hot-pressure and normal-pressure sintered AlN ceramics doped with CaO-Y2O3 were studied in this paper. The results obtained show
that the second phase in the hot-pressure sintered AlN is Y3Al5O12 and that in the normal-pressure sintered AlN is Y3Al5O12 and Ca3Y2O6.
The volume fraction of the second phase and the oxygen content dissolved in the AlN lattice of hot-pressure sintered AlN ceramics are lower than that of normal-pressure
sintered AlN. The hot-pressure sintered AlN ceramic has good microstructure and high thermal conductivity of 200W/m·K.

Key words: aluminum nitride, calcia-yttria, microstructure, thermal conductivity

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