YAG ceramics were fabricated by solid-state reaction method using high pure powders (Al, Y2O3) as
starting materials. YAG ceramics were fabricated by vacuum sintering YAG compacts which were calcined from high energy milled Al-Y2O3 powders. Al-Y2O3 powders as-milled were analyzed by DTA-TG, Al-Y2O3 powders, YAG powder and YAG ceramics were characterized by XRD and SEM. The results show that Al powders in Al-Y2O3 powders oxide intensively at 569℃, and continue to react with Y2O3, YAM phase appears after calcined at 600℃, YAP phase emerges with calcination temperature increasing, YAG phase is formed at 1200℃.YAG ceramics are fabricated from YAG compact by vacuum sintering at 1750℃ for 2h, the relative density of YAG ceramics is about 98.6%, the YAG grains grow uniformly with average size of 8-10μm tested by SEM.
LI Chang-Qing
,
ZHANG Ming-Fu
,
ZUO Hong-Bo
,
HAN Jie-Cai
,
MENG Song-He
. Investigation of High-energy Ball Milling of Al-Y2O3 Mixtures and Solid-state Reaction Synthesis of YAG Ceramics[J]. Journal of Inorganic Materials, 2008
, 23(6)
: 1131
-1134
.
DOI: 10.3724/SP.J.1077.2008.01131
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