发明授权
- 专利标题: Dielectric ceramic composition and ceramic electronic component
- 专利标题(中): 介电陶瓷组合物和陶瓷电子元件
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申请号: US13137703申请日: 2011-09-06
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公开(公告)号: US08492302B2公开(公告)日: 2013-07-23
- 发明人: Kosuke Takano , Tomohisa Fukuoka , Makoto Maeda , Yuhta Matsunaga , Masahide Ishizuya , Tamotsu Ishiyama , Takahiro Yamada
- 申请人: Kosuke Takano , Tomohisa Fukuoka , Makoto Maeda , Yuhta Matsunaga , Masahide Ishizuya , Tamotsu Ishiyama , Takahiro Yamada
- 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: JP2010-049498 20100305; JP2011-008689 20110119; JP2011-185017 20110826
- 主分类号: C04B35/468
- IPC分类号: C04B35/468 ; H01G4/12
摘要:
A dielectric ceramic composition includes a compound having perovskite type crystal structure shown by a general formula ABO3, where A is at least one selected from Ba, Ca and Sr, and B is at least one selected from Ti and Zr. The dielectric ceramic composition includes, as subcomponents, an oxide of RA (Dy, Gd and Tb); an oxide of RB (Ho and Y); an oxide of RC (Yb and Lu); Mg oxide and an oxide including Si in terms of RA2O3, RB2O3, RC2O3, Mg and Si, respectively. Also, when contents of the oxide of RA, RB and RC with respect to 100 moles of the compound are defined as “α”, “β” and “γ”, respectively, they satisfy relations of 1.2≦(α/β)≦5.0 and 0.5≦(β/γ)≦10.0.
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