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:
Aug. 16, 1988
Filed:
Jun. 10, 1986
Applicant:
Inventors:
Kiyoshi Takeuchi, State College, PA (US);
Dragan Damjanovic, State College, PA (US);
Sei-Joo Jang, State College, PA (US);
Assignee:
North American Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
501136 ; 501134 ; 501135 ; 252 629 ;
Abstract
An improved lead calcium titanate piezoelectric sintered body is produced by sintering in air at 1000.degree. C.-1200.degree. C. a calcined mixture of oxides or oxide compounds in amounts adapted to form a composition of the formula Pb.sub.1-x Ca.sub.x Ti.sub.1-y (Co.sub.1/2 W.sub.1/2).sub.y O.sub.3 +0.005-0.02(A) where A is at least one of MnO, MnO.sub.2, NiO and Nb.sub.2 O.sub.3, wherein x=0.3-0.4 and 0.04<y.ltoreq.0.06.