GU Xingyong, ZHANG Aihua, LUO Ting

(J ingdezhen Ceramic Ins titute, 333001)

Abstract: In the present work, the thermal conductivity of alumina was improved by adding aluminum nitride with high thermal conductivity.The micros tructure and crys talline s tructure were inves tigated by means of SEM and XRD. It is showed that the thermal conductivity of the AlN/Al₂O₃ based compos ite increased with the increas ing of aluminum nitride,reached the maximum value with the content of aluminum nitride at 7% and then decreased with more concentration.The lattice parameter of alumina, grain s ize,pore ratio and their respective effect on the thermal conductivity were s tudied.

Keywords: alumina, aluminum nitride, compos ite materials , thermal conductivity