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:
Nov. 17, 2009
Filed:
Mar. 28, 2007
Shigenori Yuuya, Kaisei-machi, JP;
Shigenori Yuuya, Kaisei-machi, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
Piezoelectric performance is improved in a piezoelectric ceramic having a perovskite-type crystal structure expressed by a general formula ABOand the B-site element including niobium. The piezoelectric ceramic has a perovskite-type crystal structure in which plural octahedrons formed of oxygen are arranged to share vertices thereof and elements are located at a center of eight octahedrons and at a center of each octahedron; wherein an element located at the center of eight octahedrons is A-site element, an element located at the center of each octahedron is B-site element, and a general formula of the perovskite-type crystal structure is ABO; the B-site element includes niobium (Nb); and bismuth (Bi) content in composition of the piezoelectric ceramic is 100 ppm by weight or less.