Dielectric porcelain composition having a high dielectric constant and a low sintering temperature

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United States of America Patent

PATENT NO 5633215
SERIAL NO

08601586

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Abstract

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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 %.

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Patent OwnerAddress
NEC CORPORATION108-8001 TOKYO

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Inventor Name Address # of filed Patents Total Citations
Mori, Toru Tokyo, JP 49 1049

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