Fabrication and Microstructure of Electrically Conductive AlN with High Thermal Conductivity
The electrically conductive AlN with high thermal conductivity were successfully fabricated by sintering AlN with a composite additive of 1wt.% Y2O3 and 4wt.% CeO2 in carbon-reduced atmosphere at over 1600 °C. The sudden increase in electrical conductivity is thought to be caused by transition of grain boundary phase from rare-earth oxide to rare-earth oxycarbide. Their electrical conductivities and thermal conductivities increased with increasing sintering temperature. Additionally, sintering temperature influenced the resultant microstructures.
Takashi Goto, Yi-Bing Cheng and Takashi Akatsu
T. Kusunose et al., "Fabrication and Microstructure of Electrically Conductive AlN with High Thermal Conductivity", Key Engineering Materials, Vol. 484, pp. 57-60, 2011