Abstract: AlN/borosilicate glass composites were prepared by hot-press sintering at low temperatures between 850℃ and 1000℃. The microstructures of
the composites were observed by SEM and TEM, and phases analyzed by XRD. The influences of glass content and phase distribution in the composites on their
thermal conductivities were investigated. The results show that the decrease in glass phase content will lead to the increase of thermal conductivities. When the
glass content is 50wt%, the thermal conductivity(λ) of the composite will increase with the increase of temperature. With 30wt% glass, λ decreasing with
the increase of temperature, the composite displays crystal characters.

Key words: AlN/glass composites, microstructure, phase distribution, thermal conductivity