HIGH -FREQUENCY DIELECTRIC COMPOSITION

摘要

Dielectric ceramic composition for high-frequency wave is described which has high quality coefficient(Q value) and dielectric constant, and good temperature coefficient of resonance frequency. The dielectric ceramic composition may be represented as following formula: (1-z)(Sr1-yCay)TiO3-yLa(Zn1-x/2Mgx/2Ti1/2)O3, where, x is from0 to 1.0, y is from 0.01 to 0.99 and z is from 0.4 to 0.7. The dielectric composition according to the invention has dielectricconstant of 33.1 to 60.2, Qxfo(GHz) of 25,060 to 66,140, and the temperature coefficient of resonance frequency(TCF) ranging from -53.82to +52.32 ppm/deg. C, which TCF being able to be controlled at a rangeof +-10ppm/deg. C depending on amount of addition of impurities, so thatthe ceramic composition may effectively be used in telecommunication system.