Invention Grant
- Patent Title: Dielectric ceramic composition and laminated ceramic capacitor
- Patent Title (中): 介电陶瓷组合物和层压陶瓷电容器
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Application No.: US13400933Application Date: 2012-02-21
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Publication No.: US08592335B2Publication Date: 2013-11-26
- Inventor: Takafumi Okamoto , Noriyuki Inoue , Hitoshi Nishimura
- Applicant: Takafumi Okamoto , Noriyuki Inoue , Hitoshi Nishimura
- Applicant Address: JP Nagaokakyo-Shi, Kyoto-fu
- Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee Address: JP Nagaokakyo-Shi, Kyoto-fu
- Agency: Dickstein Shapiro LLP
- Priority: JP2009-205543 20090907
- Main IPC: C04B35/468
- IPC: C04B35/468

Abstract:
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.
Public/Granted literature
- US20120147524A1 DIELECTRIC CERAMIC COMPOSITION AND LAMINATED CERAMIC CAPACITOR Public/Granted day:2012-06-14
Information query
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