Patent ID: 6195250
Filing Date: 2001-02-27
Classification: C04B,H01G

Abstract:
A dielectric ceramic composition comprising:100 parts by weight of a main component represented by a formula x(Ba.sub..alpha. Ca.sub..beta. Sr.sub..gamma.)O-y(TiO.sub.2).sub.1-m (ZrO.sub.2).sub.m -zRe.sub.2 O.sub.3 wherein x+y+z=100, .alpha.+.beta.+.gamma.=1, 0.ltoreq..beta.+.gamma.<0.8, 0.ltoreq.m<0.15, Re is at least one rare earth element, in which the mole composition ratio of (Ba.sub..alpha. Ca.sub..beta. Sr.sub..gamma.)O, (TiO.sub.2).sub.1-m (ZrO.sub.2).sub.m and Re.sub.2 O.sub.3 on a ternary composition diagram thereof is in the area surrounded by point A (39.5. 59.5, 1), point B (1, 59.5, 39.5), point C (1, 85, 14) and point D (14, 85, 1);about 25 parts by weight or less of a first sub-component which is a Pb-free B.sub.2 O.sub.3 --SiO.sub.2 glass;and a second sub-component which is at least one substance selected from V oxide and W oxide, the content of V oxide being about 10 parts by weight or less and the content of W oxide being about 20 parts by weight or less.