Invention Application
US20140009038A1 PIEZOELETRIC CERAMIC, METHOD FOR MAKING SAME, PIEZOELECTRIC ELEMENT, LIQUID DISCHARGE HEAD, ULTRASONIC MOTOR, AND DUST CLEANER
有权
PIEZOELETRIC CERAMIC,其制造方法,压电元件,液体放电头,超声波电机和除尘器
- Patent Title: PIEZOELETRIC CERAMIC, METHOD FOR MAKING SAME, PIEZOELECTRIC ELEMENT, LIQUID DISCHARGE HEAD, ULTRASONIC MOTOR, AND DUST CLEANER
- Patent Title (中): PIEZOELETRIC CERAMIC,其制造方法,压电元件,液体放电头,超声波电机和除尘器
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Application No.: US13989756Application Date: 2011-11-18
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Publication No.: US20140009038A1Publication Date: 2014-01-09
- Inventor: Takanori Matsuda , Hiroshi Saito , Tatsuo Furuta , Jumpei Hayashi , Takayuki Watanabe , Toshihiro Ifuku
- Applicant: Takanori Matsuda , Hiroshi Saito , Tatsuo Furuta , Jumpei Hayashi , Takayuki Watanabe , Toshihiro Ifuku
- Applicant Address: JP Tokyo
- Assignee: CANON KABUSHIKI KAISHA
- Current Assignee: CANON KABUSHIKI KAISHA
- Current Assignee Address: JP Tokyo
- Priority: JP2010-264223 20101126
- International Application: PCT/JP2011/077277 WO 20111118
- Main IPC: H01L41/187
- IPC: H01L41/187

Abstract:
A barium titanate piezoelectric ceramic having good piezoelectric properties and mechanical strength and a piezoelectric element that includes the ceramic are provided. A method for making a piezoelectric ceramic includes forming a compact composed of an oxide powder containing barium titanate particles, sintering the compact, and decreasing the temperature of the compact after the sintering. The sintering includes (A) increasing the temperature of the compact to a first temperature within a temperature range of a shrinking process of the compact; (B) increasing the temperature of the compact to a second temperature within a temperature range of a liquid phase sintering process of the compact after (A); (C) decreasing the temperature of the compact to a third temperature within the temperature range of the shrinking process of the compact after (B); and (D) retaining the third temperature after (C).
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Information query
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