Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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Transactions of Nonferrous Metals Society of China

Vol. 17    No. 1    January 2007

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Fabrication of transparent YAG ceramics by traditional
solid-state-reaction method
LI Chang-qing(李长青), ZUO Hong-bo(左洪波), ZHANG Ming-fu(张明福),
HAN Jie-cai(韩杰才), MENG Song-he(孟松鹤)

Center for Composite Materials, Harbin Institute of Technology, Harbin 150001, China

Abstract: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.


Key words: YAG; α-alumina; yttria; perovskite; sintering

ISSN 1004-0609
CN 43-1238/TG

ISSN 1003-6326
CN 43-1239/TG

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