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:
Jun. 09, 1998
Filed:
Jul. 24, 1997
Tadahiro Minamikawa, Shiga-ken, JP;
Akira Ando, Shiga-ken, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
Disclosed is a dielectric ceramic composition consisting essentially of a main component of (Sr.sub.1-x K.sub.X).sub.2 (Na.sub.1-x Bi.sub.x)Nb.sub.5 O.sub.15 with x being from about 0.1 to 0.35, and containing at least one of Cr, Mn, Fe, Co and Ni in an amount of from about 0.02 to 2.0% by weight relative to the main component and in terms of CrO.sub.2, MnO.sub.2, Fe.sub.2 O.sub.3, CoO and NiO. The composition contains neither Pb nor Ba, but has a specific inductive capacity comparable to that of BaTiO.sub.3 -type dielectric materials. The temperature-dependent variation in the specific inductive capacity of the composition is low. The composition is suitable for use in capacitors.