DIELECTRIC CERAMIC, PROCESS FOR PRODUCING THE SAME AND LAMINATE CERAMIC CAPACITOR

摘要

A dielectric ceramic obtained by providing a reaction product comprised of barium titanate double oxide represented by the formula (Ba1-h-i-mCahSriGdm)k(Ti1-y-j-nZryHfjMgn)O3 in which 0.995<=k<=1.015, 0<=h<=0.03, 0<=i<=0.03, 0.015<=m<=0.035, 0<=y<0.05, 0<=j<0.05, 0<=(y+j)<0.05 and 0.015<=n<=0.035; mixing less than 1.5 mol of Ma (Ba, etc.), less than 1.0 mol of Mb (Mn, etc.) and 0.5 to 2.0 mol of Mc (Si, etc.) with 100 mol of the reaction product; and firing the mixture. The obtained dielectric ceramic excels in moisture resistance; satisfies F characteristics of JIS and Y5V characteristics of EIA standards; has a relative permittivity of 9000 or higher; and excels in reliability at high temperature.