Dielectric Constant Characteristics of a New Composite Dielectric Material

Dielectric characteristics of a new composite dielectric material composed of a ceramic and a plastic resin were investigated. The composite material has two requirements: it must display stable characteristics and be adaptable to mass production. The first requirement can be met by using a ceramic material, such as the TiO 2 ‐rich part of the BaO‐PbO‐Nd 2 O 3 TiO 2 system. The second requirement can be fulfilled by using a polyoxymethylene resin. The new composite dielectric, composed of a ceramic (40 vol%) and a polyoxymethylene resin (60 vol%) and produced by injection molding, exhibits a dielectric constant of 12.1. It also displays extremely low temperature dependence in a range of −20° to 140°C as well as low frequency dependence over a range from 1 kHz to 10 MHz.