Investigation of High-energy Ball Milling of Al-Y2O3 Mixtures and Solid-state Reaction Synthesis of YAG Ceramics

doi:10.3724/SP.J.1077.2008.01131

Abstract

Abstract: 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.

Key words: high energy milling, Al, Y₂O₃, DTA-TG, YAG

CLC Number:

TB332

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, DOI: 10.3724/SP.J.1077.2008.01131.

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Investigation of High-energy Ball Milling of Al-Y₂O₃ Mixtures and Solid-state Reaction Synthesis of YAG Ceramics

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