A Study of the Thermal Conductivity, Electrical Resistivity, and Microwave Absorption of Pressureless Sintered AlN–Y2O3–Mo and AlN–Y2O3–TiN Composites

Compositions of AlN–Y2O3–Mo and AlN–Y2O3–TiN composite materials with high thermal conductivity have been selected for bulk absorbers of microwave energy in delay systems. The thermal conductivity, electrical resistivity, and electromagnetic absorption of pressureless sintered AlN-based composites with different volume concentrations of conducting Mo and TiN particles are determined.