Dielectric porcelain composition having a high dielectric constant and a low sintering temperature
AssigneeNEC Corporation
InventorToru Mori
Life of this patent
Estimating the term…
Abstract
A dielectric porcelain composition includes lead magnesium tungstate (Pb(Mg.sub.1/2 W.sub.1/2)O.sub.3), lead titanate (PbTiO.sub.3) and lead zirconate (PbZrO.sub.3) as main components at composition ratios of x, y and z respectively, wherein a point (x, y, z) in a ternary system is positioned on or within a boundary which comprises four straight line segments defined by four points of (0.725, 0.25, 0.025), (0.45, 0.525, 0.025), (0.30, 0.30, 0.40) and (0.475, 0.125, 0.40) in said ternary system as illustrated in FIG. 1, and wherein said main components are added with at least one rare earth oxide at a molar ratio in the range of 0.1-5.0 mol %.
Claims5
A dielectric porcelain composition including lead magnesium tungstate (Pb(Mg.sub.1/2 W.sub.1/2)O.sub.3), lead titanate (PbTiO.sub.3) and lead zirconate (PbZrO.sub.3) as main components and in relative proportions within a region bounded by four straight line segments defined by four points of (0.725, 0.25, 0.025), (0.45, 0.525, 0.025), (0.30, 0.30, 0.40) and (0.475, 0.125, 0.40) in the ternary phase diagram of FIG. 1, and wherein said main components are added with at least one rare earth oxide at a molar ratio in the range of 0.1-5.0 mol %.
Dependencies are inferred from the claim text.