METHOD OF DETERMINING THE DIELECTRIC CONSTANT AND POWER FACTOR OF CERAMICS AT 100 MEGACYCLES AS A FUNCTION OF TEMPERATURE

Many applications of ceramic insulators used in electron tubes subject the ceramic to temperatures of several hundred degrees centigrade and to high‐frequency electric fields. At the higher radio frequencies the dielectric heating in the insulator often becomes great enough to cause the insulator to fail. This paper describes a method of measuring the dielectric constant and power factor versus temperature for glasses and ceramics at 100 mc. per second. Measurements are given for certain ceramics at temperatures up to 500 °C. and are compared with measurements made at 15 mc. per second.