摘要
Transparent polycrystalline YAG ceramics were fabricated by solid-state reaction method using commercial ultrafine yttria andα-Al2O3 powders.The starting materials were milled and calcined at 1 400℃,and sintered into transparent YAG ceramics at 1 750℃in the vacuum for 4 h.Neither the starting materials as-milled or those calcined into YAG phase at 1 500℃can be sintered into transparent ceramics.Wide grain boundaries emerge in the YAG ceramics sintered at 1 850℃for 4 h,at the edge of which YAG phases decompose into perovskite YAlO3(YAP)andα-Al2O3.
Transparent polycrystalline YAG ceramics were fabricated by solid-state reaction method using commercial ultrafine yttria and α-Al2O3 powders. The starting materials were milled and calcined at 1 400 ℃, and sintered into transparent YAG ceramics at 1 750 ℃ in the vacuum for 4 h. Neither the starting materials as-milled or those calcined into YAG phase at 1 500 ℃ can be sintered into transparent ceramics. Wide grain boundaries emerge in the YAG ceramics sintered at 1 850 ℃ for 4 h, at the edge of which YAG phases decompose into perovskite YAlO3（YAP） and α-Al2O3.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2007年第1期148-153,共6页
Transactions of Nonferrous Metals Society of China
基金
Project(41312040404)supported by the National Defence"15"Pre-Research Foundation of China
关键词
多晶结构
铝
烧结工艺
钙钛矿
YAG
α-alumina
yttria
perovskite
sintering
