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. 26, 1988
Filed:
May. 20, 1987
Goro Nishioka, Ibaraki, JP;
Yukio Sakabe, Kyoto, JP;
Abstract
A dielectric ceramic composition consists essentially of Al.sub.2 O.sub.3 and additives composed of TiO.sub.2, MnO.sub.2 and at least one member selected from the group consisting of BaZrO.sub.3, CaTiO.sub.3 and SrTiO.sub.3, the contents of the additives per 100 parts by weight of Al.sub.2 O.sub.3 being 0.5 to 10.0 parts by weight for TiO.sub.2, 0.5 to 6.0 parts by weight for MnO.sub.2 and not more than 20 parts by weight for at least one member selected from the group consisting for BaZrO.sub.3, CaTiO.sub.3 and SrTiO.sub.3. The dielectric ceramic composition may further contain at least one oxide selected from the group consisting of Co.sub.2 O.sub.3, Fe.sub.2 O.sub.3, NiO, Cr.sub.2 O.sub.3 and CuO in an amount of not more than 5 parts by weight per 100 parts by weight of Al.sub.2 O.sub.3.