Fabrication of transparent YAG ceramics by traditional solid-state-reaction method

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...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2007, Vol.17 (1), p.148-153
Main Author: 李长青 左洪波 张明福 韩杰才 孟松鹤
Format: Article
Language:English
Subjects:
perovskite
sintering
YAG
yttria
α-alumina
多晶结构
烧结工艺
钙钛矿
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Summary: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.
ISSN:1003-6326
DOI:10.1016/S1003-6326(07)60064-8