Microwave‐Absorbing Ferrite‐Dielectric Composites

Abstract

Two‐phase composites of spinel ferrites and lithium aluminosilicates were prepared and investigated as microwave‐absorbing materials. The magnetic and dielectric loss parameters which determine the heating characteristics were examined. Low‐thermal‐expansion composites were developed which were effective absorbers of microwave radiation. Some compositions investigated exhibited a temperature maximum limited by the Curie temperature of the ferrite in the composite.