Invention Grant
- Patent Title: Piezoelectric material, piezoelectric element, liquid discharge head, ultrasonic motor, and dust cleaning device
- Patent Title (中): 压电材料,压电元件,排液头,超声波电机和除尘装置
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Application No.: US13702996Application Date: 2011-06-07
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Publication No.: US09054309B2Publication Date: 2015-06-09
- Inventor: Jumpei Hayashi , Takanori Matsuda , Takayuki Watanabe
- Applicant: Jumpei Hayashi , Takanori Matsuda , Takayuki Watanabe
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Canon U.S.A. Inc., IP Division
- Priority: JP2010-133290 20100610; JP2011-115836 20110524
- International Application: PCT/JP2011/063622 WO 20110607
- International Announcement: WO2011/155633 WO 20111215
- Main IPC: H01L41/04
- IPC: H01L41/04 ; H01L41/187 ; B08B7/02 ; C01F11/00 ; C01G33/00 ; C04B35/495 ; H01L41/43 ; H02N2/10 ; H02N2/16 ; B41J2/14

Abstract:
A piezoelectric material including a strontium calcium sodium niobate-based tungsten bronze structure metal oxide having a high degree of orientation is provided. A piezoelectric element, a liquid discharge head, an ultrasonic motor, and a dust cleaning device including the piezoelectric material are also provided. A piezoelectric material includes a tungsten bronze structure metal oxide that includes metal elements which are strontium, calcium, sodium, and niobium, and tungsten. The metal elements satisfy following conditions on a molar basis: when Sr/Nb=a, 0.320≦a≦0.430, when Ca/Nb=b, 0.008≦b≦0.086, and when Na/Nb=c, 0.180≦c≦0.200. The tungsten content on a metal basis is 0.40 to 3.20 parts by weight relative to 100 parts by weight of the tungsten bronze structure metal oxide. The tungsten bronze structure metal oxide has a c-axis orientation.
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