Preparation of Al2O3-YAG Composite by the Heterogeneous Precipitation Method

Abstract

Abstract: Zeta potential of YAG powder was measured, and well-dispersed YAG aqueous suspension could be obtained through regulating pH value. Al₂O₃-YAG
composite powder containing uniformly distributed YAG was prepared by using the heterogeneous precipitation method. Sintered bodies were gotten by hot-pressing,
and addition of YAG influenced little on sintering temperature. Bending strength and fracture toughness of Al₂O₃-5vol%YAG composite were 485MPa and
4.2MPa·m^1/2 respectively. Both were higher than those of monolithic Al₂O₃ ceramics, and the reliability of values was also better than that of
Al₂O₃ ceramics. Through TEM observation, it could be seen that YAG particles were uniformly distributed throughout materials. It indicated that Al₂O₃-YAG
composite with good YAG dispersion could be obtained by using the heterogeneous precipitation method.

Key words: YAG, Al₂O₃, powder, precipitation, composite

CLC Number:

TB323

WANG Hong-Zhi,GAO Lian,LI Wei-Qun. Preparation of Al₂O₃-YAG Composite by the Heterogeneous Precipitation Method[J]. Journal of Inorganic Materials.

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Preparation of Al₂O₃-YAG Composite by the Heterogeneous Precipitation Method

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