摘要
研究了以Ｂ_２Ｏ_３－Ｙ_２Ｏ_３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ＹＡｌＯ_３，Ｙ_４Ａｌ_２Ｏ_９及Ｙ_３Ａｌ_５Ｏ_（１２）等各种铝酸钇结晶物，Ｂ_２Ｏ_３可固溶到铝酸钇中形成固溶体。随烧结温度变化，第二相的种类、数量和分布不同，从而影响ＡｌＮ的热导率。在１８５０℃下，可获得热导率为１８９Ｗ／ｍ·Ｋ的ＡｌＮ陶瓷。
The influence of B_2O_3-Y_2O_3 as a sintering aid on sintering characteristic and microstructure of AlN ceramics was studied. The results show that all kinds of yttrium aluminates such as YALO_3,Y_4Al_2O_9 and Y_3Al_5O_(12), appear in the grain boundaries, and B_2O-3 can dissolve in yttrium aluminates. The sintering temperature affects the kinds, amount and distribution of secondary phases, and therefore influence the thermal conductivity. AIN ceramics with thermal conductivity 189W/(m·K) is obtained at 1850℃.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1996年第2期146-151,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金
关键词
氮化铝
氧化硼
氧化钇
显微结构
陶瓷
s: aluminum nitride,boron oxide-yttrium oxide, microstructure, thermal conductivity
