Patent ID: 6258462
Filing Date: 2001-07-10
Classification: C03C,C04B,H01P

Abstract:
A dielectric ceramic composition comprising:Al.sub.2 O.sub.3, MgO and RO.sub.n, expressed by a composition formula;xAlO.sub.3/2 --yMgO--zRO.sub.n,wherein x.gtoreq.55, y.gtoreq.0.5, z.gtoreq.0.5, x+y+z=100, R is at least one element selected from the group consisting of La, Ce, Pr, Nd, Sm, Eu, Gd and Tb, and n is a value stoichiometrically determined in accordance with the valence of said R; anda glass composition comprising at least one selected from the group consisting of SiO.sub.2 and B.sub.2 O.sub.3 as a second component in an amount of 70 weight % or less.