CAPACITOR AND DIELECTRIC CERAMIC POWDER BASED UPON A BARIUM BORATE AND ZINC SILICATE DUAL-COMPONENT SINTERING FLUX

摘要

PURPOSE: Temperature compensating capacitors, and dielectric compositions therefor, based upon a dual-component sintering flux of barium borate and zinc silicate to yield high quality factors and densities when sintered below 1,155°C are provided. CONSTITUTION: Temperature compensating capacitors and dielectric ceramic powder compositions therefor are disclosed, based upon a dual-component barium borate and zinc silicate sintering flux. The precursor dielectric ceramic powders can include (1-m) BaTiO3 + (m) CaZrO3 (BTCZ composition), with m ranging from 20 mole percent to 35 mole percent, xBaO.yTiO2.zRE2O3 (rare earth composition), (RE being a rare earth metal), with x ranging from 0m% to 30m%, y ranging from 45m% to 95m%, and z ranging from 5m% to 50m%, or a combination of the BTCZ and rare earth composition in varying weight percents. The effective range of B2O3 in the barium borate ranges from 0.029w% to 2.75w% of the total dielectric composition, whereas the effective range of SiO2 in the zinc silicate ranges from 0.08w% to 1.42w% of the total dielectric composition.