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:
Feb. 28, 2012
Filed:
Dec. 18, 2007
Applicants:
Kazuyuki Kaigawa, Nagoya, JP;
Shuichi Ozawa, Nagoya, JP;
Hirofumi Yamaguchi, Nagoya, JP;
Inventors:
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01G 33/00 (2006.01); C04B 35/468 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method for manufacturing (Li, Na, K)(Nb, Ta)Otype piezoelectric material having an improved relative dielectric constant and an electric-field-induced strain is provided. The method is a process in which a formed body of powder particles constituted of a composition of (Li, Na, K)(Nb, Ta)Ois fired to produce the (Li, Na, K)(Nb, Ta)Otype piezoelectric material, and a constant temperature is kept in a range of 850 to 1000° C. for a constant time before heating to a firing temperature.