LOW TEMPERATURE SINTERING AND THERMAL CONDUCTIVITY OF AlN CERAMICS

摘要

The present study was carried out to investigate the low temperature sintering and thermal properties of A1N added with mixed additives of CaO-YF_3 and Y_2O_3.rnAs the sample which sintered in the carbon reducing atmosphere at 1600℃ did not show high density, we tried two stage sintering. In the first stage, the mixtures were sintered in the non-reducing atmosphere for obtaining high density ceramics. After the first stage sintering, the samples were annealed in the strongly reducing atmosphere. Using the second stage sintering, high thermal conductivity (～250W/m • K) was obtained.