发明申请
- 专利标题: DIELECTRIC CERAMIC COMPOSITION AND LAMINATED CERAMIC CAPACITOR
- 专利标题(中): 电介质陶瓷组合物和层压陶瓷电容器
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申请号: US13400933申请日: 2012-02-21
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公开(公告)号: US20120147524A1公开(公告)日: 2012-06-14
- 发明人: Takafumi Okamoto , Noriyuki Inoue , Hitoshi Nishimura
- 申请人: Takafumi Okamoto , Noriyuki Inoue , Hitoshi Nishimura
- 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: JP2009-205543 20090907
- 主分类号: H01G4/06
- IPC分类号: H01G4/06 ; C04B35/468
摘要:
A dielectric ceramic composition contains a barium titanate based composite oxide as its main constituent, and contains a first accessory constituent including at least Al and a second accessory constituent including one or more elements selected from among Fe, Co, Ni, Cu, and Zn, wherein the content of the Al is 0.02 to 6 parts by mol with respect to 100 parts by mol of the main constituent, and the content ratio of the second accessory constituent to the Al is 0.01 to 0.4 in terms of mols. Dielectric layers are formed from a sintered body of the dielectric ceramic composition. The addition of various types of accessory elements such as rare-earth elements is possible, if necessary. This invention achieves a dielectric ceramic composition which is capable of ensuring favorable DC bias characteristics while ensuring high reliability, and a laminated ceramic capacitor using the dielectric ceramic composition.
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