发明申请
- 专利标题: PIEZOELECTRIC MATERIAL AND PIEZOELECTRIC ELEMENT
- 专利标题(中): 压电材料和压电元件
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申请号: US12413796申请日: 2009-03-30
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公开(公告)号: US20090243438A1公开(公告)日: 2009-10-01
- 发明人: Yasuaki HAMADA , Takeshi KIJIMA
- 申请人: Yasuaki HAMADA , Takeshi KIJIMA
- 申请人地址: JP Tokyo
- 专利权人: SEIKO EPSON CORPORATION
- 当前专利权人: SEIKO EPSON CORPORATION
- 当前专利权人地址: JP Tokyo
- 优先权: JP2008-095054 20080401
- 主分类号: H01L41/187
- IPC分类号: H01L41/187 ; B41J2/045
摘要:
A piezoelectric element includes a first electrode, a piezoelectric film disposed on the first electrode, and a second electrode disposed on the piezoelectric film. The piezoelectric film is composed of piezoelectric material that is lead free and formed by mixing 100(1−x)% of material A having a spontaneous polarization of 0.5 C/m2 or greater at 25° C. and 100 x % of material B having piezoelectric characteristics and a dielectric constant of 1000 or greater at 25° C., wherein (1−x)Tc(A)+xTc(B)≧300° C., where Tc(A) is the Curie temperature of the material A and Tc(B) is the Curie temperature of the material B.
公开/授权文献
- US08102100B2 Piezoelectric material and piezoelectric element 公开/授权日:2012-01-24
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