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．
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.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第6期989-994,共6页
Journal of Inorganic Materials
基金
国家自然科学基金!69836030
关键词
烧结
显微结构
热导率
氮化铝陶瓷
aluminum nitride, yttrium oxide-dysprosium oxide, sintering characteristic, microstructure, thermal conductivity
