Patent ID: 6853536
Filing Date: 2005-02-08
Classification: B32B,C04B,H01G

Abstract:
1. A dielectric ceramic having crystal grains and crystal grain boundaries between the crystal grains comprising: a perovskite compound having the general formula ABO an additive component containing Si, R and M, in which R represents at least one of La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y, and M represents at least one of Mn, Ni, Co, Fe, Cr, Cu, Mg, Al, V, Mo and W, wherein the additive component is not solid-dissolved and, wherein the major component exists in at least about 90% of the cross-section of at least about 85% by number of all of the crystal grains, and wherein at least Ba, Ca, Ti, Si, R and the M are found at about 85% or more of the analytical points in the crystal grain boundaries.