Invention Grant
- Patent Title: Piezoelectric ceramic, method for producing piezoelectric ceramic, and piezoelectric ceramic electronic component
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Application No.: US14938166Application Date: 2015-11-11
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Publication No.: US10193054B2Publication Date: 2019-01-29
- Inventor: Shinichiro Kawada , Shoichiro Suzuki , Hideki Ishii , Hiroyuki Hayashi , Suetake Omiya , Takashi Oyama
- Applicant: Murata Manufacturing Co., Ltd.
- Applicant Address: JP Nagaokakyo-Shi, Kyoto-Fu
- Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee Address: JP Nagaokakyo-Shi, Kyoto-Fu
- Agency: Arent Fox LLP
- Priority: JP2013-102939 20130515
- Main IPC: H01L41/187
- IPC: H01L41/187 ; H01L41/273 ; H03H9/02 ; H03H9/17 ; H01L41/083 ; C04B35/495 ; C04B35/626 ; C04B35/64

Abstract:
A piezoelectric ceramic that contains an alkali niobate compound as its main ingredient. The alkali niobate compound has a perovskite crystal structure represented by AmBO3 and contains an alkali metal. There exists Sn in part of site A, and Zr in part of site B. A radial distribution function obtained from a K-edge X-ray absorption spectrum of Sn has a first peak intensity P1 at a first distance from a Sn atom and a second peak intensity P2 at a second distance from the Sn atom. The second distance is greater than the first distance, and the peak intensity ratio P1/P2 is 2.7 or less.
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