发明申请
- 专利标题: DIELECTRIC CERAMIC AND MULTILAYER CERAMIC CAPACITOR
- 专利标题(中): 电介质陶瓷和多层陶瓷电容器
-
申请号: US11947431申请日: 2007-11-29
-
公开(公告)号: US20080112109A1公开(公告)日: 2008-05-15
- 发明人: Kazuo Muto , Tomoyuki Nakamura , Harunobu Sano
- 申请人: Kazuo Muto , Tomoyuki Nakamura , Harunobu Sano
- 申请人地址: JP Nagaokakyo-Shi
- 专利权人: MURATA MANUFACTURING CO., LTD.
- 当前专利权人: MURATA MANUFACTURING CO., LTD.
- 当前专利权人地址: JP Nagaokakyo-Shi
- 优先权: JP2005-170305 20050610
- 主分类号: H01G4/12
- IPC分类号: H01G4/12 ; C04B35/00
摘要:
A dielectric ceramic includes a compound represented by the general formula: (Ba1-tCat)m(Ti1-u-xZruCux)O3 (where 0.96≦m≦1.02, 0.001≦x≦0.03, 0≦t≦0.1, and 0≦u≦0.06) as a primary component, a rare earth element Re such as Dy, a metal element M such as Mn, Mg, and Si. In the dielectric ceramic, the Cu is uniformly and dispersedly present in the primary phase grain forming the primary component, and the contents of the accessory components with respect to 100 molar parts of the primary component are 0.1 to 1.5 molar parts of Re, 0.1 to 0.6 molar parts of M, 0.1 to 1.5 molar parts of Mg and 0.1 to 2.0 molar parts of Si. Accordingly, a multilayer ceramic capacitor can be realized which has a high dielectric constant, superior temperature properties, and a high reliability, and also has a small change in electrostatic capacitance with time.
公开/授权文献
- US07397649B2 Dielectric ceramic and multilayer ceramic capacitor 公开/授权日:2008-07-08
信息查询