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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.:

US 5006956 B1

PDFFull Text
Date of Patent:
Apr. 09, 1991

Filed:

Nov. 07, 1989

Dielectric ceramic composition

Applicant:
Inventors:

Kouji Kawakita, Joyo, JP;

Suzushi Kimura, Toyonaka, JP;

Hideyuki Orinaka, Toyonaka, JP;

Youichiro Yokotani, Suita, JP;

Mariko Ishikawa, Osaka, JP;

Assignee:

Matsushita Electric Industrial Co., Ltd., Osaka, JP;

Attorney:

Wenderoth, Lind & Ponack

Primary Examiner:

Mark L Bell

Assistant Examiner:

Deborah Jones

Int. Cl.
CPC ...
H01G / ; C04B / ;
U.S. Cl.
CPC ...
361321 ; 501134 ; 501136 ;
Abstract

A dielectric ceramic composition exhibiting a high dielectric constant, capable of sintering in a short time, at a sintering temperature of 800.degree. to 1000.degree. C., in the atmosphere, a neutral atmosphere or a reducing atmosphere. The dielectric ceramic composition comprises a main ceramic component represented by the formula PbTi.sub.x (Mg.sub.1/3 Nb.sub.2/3).sub.y (Ni.sub.1/2 W.sub.1/2).sub.z O.sub.3, wherein x+y+z=1, and subsidiary components of PbO is added in an amount of 1.0 to 25.0 mol % and NiO or WO.sub.3 in an amount of 1.0 to 15.0 mol %. The subsidiary components are added to the calcined powder of the main component. Also provided is a dielectric ceramic composition comprising a main ceramic component represented by the formula PbZr.sub.x (Ni.sub.1/3 Nb.sub.2/3).sub.y (Ni.sub.1/2 W.sub.1/2).sub.z O.sub.3, wherein x+y+z=1, and subsidiary components of PbO in an amount of 1.0 to 25.0 mol % and NiO in an amount of 1.0 to 15.0 mol %. The subsidiary components are added to the calcined powder of the main component. The dielectric ceramic compositions are useful in preparing laminate ceramic capacitors and thick film capacitors.

Find Patent Forward Citations

Kawakita, Kouji. (1991). Dielectric ceramic composition (U.S. Patent No. 5006956). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5006956

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