Dielectric ceramic composition

Details Dielectric ceramic composition Dielectric ceramic composition

1991-07-02

1992-10-06

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

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

501134, C04B 3502

Patent

active

051531542

ABSTRACT:
A dielectric ceramic composition possessing a high relative dielectric constant, a high unloaded Q value, and an excellent temperature characteristic is expressed as xPbO-.sub.y (Mg.sub.1/3 Nb.sub.2/3)O.sub.2 -zCaO, where x+y+z=1, and x, y, z are in the following ranges, 0.05.ltoreq.x.ltoreq.0.45, 0.4.ltoreq.y.ltoreq.0.55, 0.15.ltoreq.z.ltoreq.0.4, or expressed as xPbO-y(Ni.sub.1/3 Nb.sub.2/3) O.sub.2 -zCaO, where x+y+z=1, and x,y, z are in a quadrangular region with vertexes at A (x=0.25 y=0.7 z=0.05), B (x=0.2 y=0.7 z=0.1), C (x=0.2 y=0.45 z=0.35), and D (x=0.35 y=0.45 z=0.2), which are composition points of a ternary system with vertexes at PbO, (Ni.sub.1/3 Nb.sub.2/3)O.sub.2, and CaO.

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