发明申请
- 专利标题: Piezoelectric ceramic composition, production method thereof, piezoelectric element and fabrication method thereof
- 专利标题(中): 压电陶瓷组合物及其制造方法,压电元件及其制造方法
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申请号: US11369812申请日: 2006-03-08
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公开(公告)号: US20060202152A1公开(公告)日: 2006-09-14
- 发明人: Kumiko Iezumi , Takeo Tsukada , Masayoshi Inoue , Junichi Yamazaki , Masaru Nanao , Masahito Furukawa , Hideya Sakamoto , Norimasa Sakamoto
- 申请人: Kumiko Iezumi , Takeo Tsukada , Masayoshi Inoue , Junichi Yamazaki , Masaru Nanao , Masahito Furukawa , Hideya Sakamoto , Norimasa Sakamoto
- 申请人地址: JP Tokyo
- 专利权人: TDK CORPORATION
- 当前专利权人: TDK CORPORATION
- 当前专利权人地址: JP Tokyo
- 优先权: JP2005-066227 20050309; JP2005-089582 20050325; JP2005-089592 20050325; JP2005-249432 20050830
- 主分类号: C04B35/00
- IPC分类号: C04B35/00 ; C04B35/49 ; H01L41/18 ; B28B3/00 ; C04B35/64
摘要:
A piezoelectric ceramic composition has as a chief ingredient a composite oxide that has Pb, Ti and Zr as constituent elements. It contains as a first accessory ingredient at least one element selected from the group consisting of Mn, Co, Cr, Fe and Ni in an amount of 0.2 mass % or less excluding 0 mass % in terms of an oxide. As the first accessory ingredient, at least one species selected from the ingredients represented by CuOx, wherein x≧0, can be adopted. In this case, the content of the first accessory ingredient is 3.0 mass % or less excluding 0 mass %. The piezoelectric ceramic composition is fired under reducing and firing conditions. The reducing and firing conditions include a firing temperature in the range of 800° C. to 1200° C. and an oxygen partial pressure in the range of 1×10−10 to 1×10−6 atm., for example.
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