Patent ID: 6028021
Filing Date: 2000-02-22
Classification: C04B

Abstract:
A microwave dielectric composition consisting essentially of the main composition of lead oxide (PbO), calcium oxide (CaO), zirconium oxide (ZrO.sub.2) and tin oxide (SnO.sub.2), expressed by the formula (Pb.sub.1-x Ca.sub.x)(Zr.sub.1-y Sn.sub.y)O.sub.3, wherein x and y each represent a mole fraction under the condition of 0.15<x<0.40 mol. and 0.15<y<0.50 mol, and oxide of manganese as an additive wherein the amount of additive is less than 3% by weight on the basis of 100 parts by weight of a main composition.