Ostrolenk, Faber, Gerb & Soffen
Non-reducing dielectric ceramic composition
 A non-reducing dielectric ceramic composition consists essentially of a basic composition expressed by the general formula: xPb(Mg.sub.1/3 Nb.sub.2/3)O.sub.3 --yPb(Zn.sub.1/3 Nb.sub.2/3)O.sub.3 --zPbTiO.sub.3 where x, y and z are percentages by weight of the respective component and take values within the following respective ranges 98.5.ltoreq.x.ltoreq.59.5, 1.0.ltoreq.y.ltoreq.40.0, 0.5.ltoreq.z.ltoreq.10.0, and an anti-reducing agent incorporated therein and expressed by the general formula: aLi.sub.2 O--bRO--cB.sub.2 O.sub.3 +(1--a--b--c)SiO.sub.2 where R is at least one element selected from the group consisting of Mg, Ca, Sr and Ba, a, b, and c are molar ratios of the respective component and take values within the following respective ranges: 0.ltoreq.a.ltoreq.0.2, 0.1.ltoreq.b.ltoreq.0.55, 0.ltoreq.c.ltoreq.0.4. 
Murata Manufacturing Co., Ltd.
H C
H01G C04B
inventional inventional
Yukio Masaru Hiroshi Yoshiaki
Sakabe Fujino Takagi Mori