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:
May. 02, 1978
Filed:
Nov. 30, 1973
Applicant:
Inventors:
Yoichi Tanaka, Funabashi, JA;
Masamichi Tsuruta, Chiba, JA;
Koji Takahashi, Chiba, JA;
Tsutomu Hasegawa, Tokyo, JA;
Makoto Hori, Ichihara, JA;
Assignee:
TDK Electronic Company, Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ; C04B / ;
U.S. Cl.
CPC ...
252 629 ;
Abstract
A piezoelectric ceramic composition which comprises the combination of a pyrochlore composite oxide and a base ceramic mixture of PbTiO.sub.3 and PbZrO.sub.3 is prepared by individually forming pyrochlore composite oxide, PbTiO.sub.3 and PbZrO.sub.3 components; and sintering a mixture of the formed components at a temperature greater than 1,000.degree. C.