发明授权
- 专利标题: Dielectric ceramic composition and ceramic electronic device
- 专利标题(中): 介电陶瓷组合物和陶瓷电子器件
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申请号: US13221246申请日: 2011-08-30
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公开(公告)号: US08507395B2公开(公告)日: 2013-08-13
- 发明人: Yoshitaka Murakawa , Yukie Nakano , Shirou Ootsuki
- 申请人: Yoshitaka Murakawa , Yukie Nakano , Shirou Ootsuki
- 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
- 代理机构: Oliff & Berridge, PLC
- 优先权: JP2010-195107 20100831
- 主分类号: C04B35/468
- IPC分类号: C04B35/468
摘要:
A dielectric ceramic composition comprising a compound expressed by a formula of ABO3, where “A” is Ba alone, or Ba and at least one selected from Ca and Sr, and “B” is Ti alone, or Ti and Zr, and having a perovskite-type crystal structure, and an oxide of a rare-earth element including Sc and Y. The dielectric ceramic composition includes a dielectric particle having a core-shell structure which has a core and a shell, the shell being present around the core and including at least “R” element, and in the shell, a region showing a maximum content rate of “R” element is a boundary region between the core and the shell.