Influence of CaO-Y2O3 as Sintering Aid on the Microstructure and Properties of AlN Ceramics

Abstract

Abstract: The property and microstructure of hot-pressure and normal-pressure sintered AlN ceramics doped with CaO-Y₂O₃ were studied in this paper. The results obtained show
that the second phase in the hot-pressure sintered AlN is Y₃Al₅O₁₂ and that in the normal-pressure sintered AlN is Y₃Al₅O₁₂and Ca₃Y₂O₆.
The volume fraction of the second phase and the oxygen content dissolved in the AlN lattice of hot-pressure sintered AlN ceramics are lower than that of normal-pressure
sintered AlN. The hot-pressure sintered AlN ceramic has good microstructure and high thermal conductivity of 200W/m·K.

Key words: aluminum nitride, calcia-yttria, microstructure, thermal conductivity

CLC Number:

TQ174

HUANG Xiao-Li,MA Qing-Zhi,LI Fa,LIU Hui-Qing. Influence of CaO-Y₂O₃ as Sintering Aid on the Microstructure and Properties of AlN Ceramics[J]. Journal of Inorganic Materials.

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Influence of CaO-Y₂O₃ as Sintering Aid on the Microstructure and Properties of AlN Ceramics

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