The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 1991
Filed:
Feb. 21, 1990
Yoshiaki Mori, Nagaokakyo, JP;
Masaru Fujino, Takatsuki, JP;
Hiroshi Takagi, Otsu, JP;
Yukio Sakabe, Kyoto, JP;
Abstract
A dielectric ceramic composition consists essentially of a basic composition of a ternary system, Pb(Mg.sub.1/2 W.sub.1/2)O.sub.3 -PbTiO.sub.3 -PbZrO.sub.3, and 0.05 to 6.5 wt % of an antireducing agent incorporated therein. The basic composition comprises a main component represented by the general formula: xPb(Mg.sub.1/2 ; W.sub.1/2)O.sub.3 -yPbTiO.sub.3 -zPbZrO.sub.3 wherein x, y and z are mole percentages of the respective components, and 0.3 to 2.0 wt % of ZnO contained therein. The main component has a composition falling within the area of a polygen ABCD defined by points A(52.0, 44.0, 4.0), B(47.0, 38.3, 15.0), C(44.0, 40.0, 16.0), D(49.0, 46.0, 5.0) in the attached figure. The antireducing agent has a composition expressed by the general formula: