Dielectric porcelain composition having a high dielectric consta

Details Dielectric porcelain composition having a high dielectric consta Dielectric porcelain composition having a high dielectric consta

1996-02-14

1997-05-27

Group, Karl

Compositions: ceramic

Ceramic compositions

Titanate, zirconate, stannate, niobate, or tantalate or...

501134, C04B 3546, C04B 35472

Patent

active

056332157

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 %.

REFERENCES:
patent: 4450240 (1984-05-01), Miyamoto et al.
patent: 4582814 (1986-04-01), Thomas
patent: 4985381 (1991-01-01), Mori et al.

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