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:
Sep. 25, 1990
Filed:
Jul. 27, 1989
Yoshiaki Mori, Nagaokakyo, JP;
Hiroshi Takagi, Ohtsu, JP;
Masaru Fujino, Nagaokakyo, JP;
Yukio Sakabe, Kyoto, JP;
Abstract
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.