Invention Grant
US08420560B2 Dielectric ceramic, method for producing dielectric ceramic, and method for producing powder for producing dielectric ceramic
有权
介电陶瓷，电介质陶瓷的制造方法以及制造电介质陶瓷的粉末的制造方法
- Patent Title: Dielectric ceramic, method for producing dielectric ceramic, and method for producing powder for producing dielectric ceramic
- Patent Title (中): 介电陶瓷，电介质陶瓷的制造方法以及制造电介质陶瓷的粉末的制造方法
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Application No.: US13051537Application Date: 2011-03-18
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Publication No.: US08420560B2Publication Date: 2013-04-16
- Inventor: Takahiro Nakano , Yasuharu Miyauchi , Tomoko Nakamura
- Applicant: Takahiro Nakano , Yasuharu Miyauchi , Tomoko Nakamura
- Applicant Address: JP Tokyo
- Assignee: TDK Corporation
- Current Assignee: TDK Corporation
- Current Assignee Address: JP Tokyo
- Agency: Oliff & Berridge, PLC
- Priority: JP2010-080848 20100331
- Main IPC: C04B35/468
- IPC: C04B35/468
Abstract:
A dielectric ceramic includes a main component and a minor component. The main component includes a BaTi4O9 crystal phase and a Ba2Ti9O20 crystal phase, is represented by BaO.xTiO2, has a molar ratio x of TiO2 to BaO of 4.6 to 8.0, and in X-ray diffraction, and has an X-ray diffraction peak intensity ratio I29/I14 of a maximum diffraction peak intensity (I14) of the BaTi4O9 crystal phase to a maximum diffraction peak intensity (I29) of the Ba2Ti9O20 crystal phase of 1 or more. The minor component includes a boron oxide and a copper oxide, in which the boron oxide content is in the range of 0.5 to 5.0 parts by mass with respect to 100 parts by mass of the main component, and the copper oxide content is in the range of 0.1 to 3.0 parts by mass with respect to 100 parts by mass of the main component.
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