DIELECTRIC CERAMIC COMPOSITION, PROCESS FOR PRODUCING THE SAME, DIELECTRIC CERAMIC EMPLOYING IT AND MULTILAYER CERAMIC COMPONENT

摘要

A dielectric ceramic composition having a relative dielectric constantɛr of 15-25 allowing formation of a multilayer ceramic component having an appropriate size, capable of being sintered at a temperature lower than 800-1000°C allowing incorporation and lamination of low resistance conductors of Cu or Ag through simultaneous sintering, and having a low dielectric loss tan delta (high Q-value) and a temperature coefficient tauf of resonance frequency has an absolute value not larger than 50 ppm/°C. The dielectric ceramic composition, 3-30 pts.wt. of lead-free low melting point glass contains 50-75 wt.% of ZnO, 5-30 wt.% of B2O3, 6-15 wt.% of SiO2, 0.5-5 wt.% of Al2O3, and 3-10 wt.% of BaO , based on 100 pts.wt. of principal component represented by a general formula x'Zn2TiO4-(1-x'-y')ZnTiO3-y'TiO2 where 0.15