Sintering Characteristic and Microstructure of AlN-based Ceramics with the Addition of Y2O3-Dy2O3

Abstract

Abstract: Sintering characteristic and microstructure of Y₂O₃-Dy₂O₃- doped anti-hydrolysis AlN powders synthesized by SHS method were studied. The results show that all kinds of secondary phases, such as Dy₄Al₂O₉, Y₄Al₂O₉, DyAlO₃, Dy₂O₃ and DyN, will appear in the grain boundaries. The sintering temperature affects the microstructure and the kinds, amount and distribution of secondary phases, and therefore influences the thermal conductivity. AlN ceramic s thermal conductivity obtained at 1850℃ is 148W/m·K.

Key words: aluminum nitride, yttrium oxide-dysprosium oxide, sintering characteristic, microstructure, thermal conductivity

CLC Number:

TQ133

XU Xin-Rui,ZHUANG Han-Rui,XU Su-Ying,LI Wen-Lan,WU Feng-Ying. Sintering Characteristic and Microstructure of AlN-based Ceramics with the Addition of Y₂O₃-Dy₂O₃[J]. Journal of Inorganic Materials.

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Sintering Characteristic and Microstructure of AlN-based Ceramics with the Addition of Y₂O₃-Dy₂O₃

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