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无机材料学报

无机材料学报

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添加Y2O3-Dy2O3的AlN陶瓷的烧结特性及显微结构

许昕睿; 庄汉锐; 徐素英; 李文兰; 邬凤英   

  1. 中国科学院上海硅酸盐研究所; 上海 200050
  • 收稿日期:1998-11-11 修回日期:1999-01-12 出版日期:1999-12-20 网络出版日期:1999-12-20

Sintering Characteristic and Microstructure of AlN-based Ceramics with the Addition of Y2O3-Dy2O3

XU Xin-Rui; ZHUANG Han-Rui; XU Su-Ying; LI Wen-Lan; WU Feng-Ying   

  1. Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai 200050; China）
  • Received:1998-11-11 Revised:1999-01-12 Published:1999-12-20 Online:1999-12-20

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摘要： 本文探索了以自蔓延高温（SHS）法合成并经抗水化处理的AlN粉为原料，以Y2O3－Dy2O3作为助烧结剂的AlN陶瓷的烧结特性及显微结构．结果表明，晶界处存在Dy4Al2O9、Y4Al2O9、DyAlO3、Dy2O3和DyN等第二相物质，随烧结温度变化，第二相的种类、数量和分布不同，显微结构也随之变化，从而影响AlN的热导率．在1850℃下，可获得热导率为148W／m·K的AlN陶瓷．

关键词: AlN, Y2O3－Dy2O3, 烧结特性, 显微结构, 热导率

Abstract: Sintering characteristic and microstructure of Y2O3-Dy2O3- doped anti-hydrolysis AlN powders synthesized by SHS method were studied. The results show that all kinds of secondary phases, such as Dy4Al2O9, Y4Al2O9, DyAlO3, Dy2O3 and DyN, will appear in the grain boundaries. The sintering temperature affects the microstructure and the kinds, amount and distribution of secondary phases, and therefore influences the thermal conductivity. AlN ceramic s thermal conductivity obtained at 1850℃ is 148W/m·K.

Key words: aluminum nitride, yttrium oxide-dysprosium oxide, sintering characteristic, microstructure, thermal conductivity

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