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. 29, 2022
Filed:
Jan. 31, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Makoto Kubota, Yokohama, JP;
Yasushi Shimizu, Fujisawa, JP;
Takanori Matsuda, Chofu, JP;
Tatsuo Furuta, Machida, JP;
Kaoru Miura, Matsudo, JP;
Miki Ueda, Tokyo, JP;
Kanako Oshima, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is a piezoelectric ceramics having a gradual change in piezoelectric constant depending on an ambient temperature. Specifically, provided is a single-piece piezoelectric ceramics including as a main component a perovskite-type metal oxide represented by a compositional formula of ABO, wherein an A site element in the compositional formula contains Ba and M, the Mbeing formed of at least one kind selected from the group consisting of Ca and Bi, wherein a B site element in the compositional formula contains Tand M, the Mbeing formed of at least one kind selected from the group consisting of Zr, Sn, and Hf, wherein concentrations of the Mand the Mchange in at least one direction of the piezoelectric ceramics, and wherein increase and decrease directions of concentration changes of the Mand the Mare directions opposite to each other.