Invention Grant
- Patent Title: Piezoelectric ceramic composition
- Patent Title (中): 压电陶瓷组合物
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Application No.: US12076694Application Date: 2008-03-21
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Publication No.: US07985348B2Publication Date: 2011-07-26
- Inventor: Takeo Tsukada , Masahito Furukawa
- Applicant: Takeo Tsukada , Masahito Furukawa
- Applicant Address: JP Tokyo
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP Tokyo
- Agent Manabu Kanesaka
- Priority: JP2007-080721 20070327
- Main IPC: H01L41/187
- IPC: H01L41/187

Abstract:
A piezoelectric ceramic composition having a large piezoelectric constant (d) and as well having a large Qm value is to be provided. The piezoelectric ceramic composition aimed at has a composition corresponding to a solid solution containing a first compound possessing a rhombohedral crystal-based perovskite structure, a second compound possessing a tetragonal crystal-based perovskite structure, and a third compound. The third compound is a compound oxide containing Bi as a first component element, Mn as a second component element, and a tetravalent metallic element or a pentavalent metallic element as a third component element. The tetravalent metallic element is at least one member selected from the group consisting of Ti, Zr, Hf, and Sn. The pentavalent metallic element is at least one member selected from the group consisting of Nb, Ta, and Sb.
Public/Granted literature
- US20080237531A1 Piezoelectric ceramic composition Public/Granted day:2008-10-02
Information query
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