发明授权
- 专利标题: Dielectric ceramic composition
- 专利标题(中): 介电陶瓷组合物
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申请号: US125483申请日: 1987-11-25
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公开(公告)号: US4820670A公开(公告)日: 1989-04-11
- 发明人: Harunobu Sano , Hiroaki Ichikawa , Goro Nishioka , Yukio Sakabe
- 申请人: Harunobu Sano , Hiroaki Ichikawa , Goro Nishioka , Yukio Sakabe
- 申请人地址: JPX
- 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: JPX
- 优先权: JPX61-282772 19861126; JPX61-300251 19861216; JPX61-300252 19861216
- 主分类号: C04B35/47
- IPC分类号: C04B35/47 ; C04B35/46
摘要:
A dielectric ceramic composition consists essentially of a main component of a SrTiO.sub.3 --PbTiO.sub.3 --Bi.sub.2 O.sub.3 --TiO.sub.2 --CaTiO.sub.3 system and secondary components of manganese oxides, at least one oxide of rare earth elements selected from the group consisting of Nd, La, Ce, Pr and Sm, and one of complex perovskite compounds expressed by the following general formula:A(Cu.sub.1/2 W.sub.1/2)O.sub.3(where A is at least one element selected from the group consisting of Pb, Sr and Ca),A(Cu.sub.1/3 Ta.sub.2/3)O.sub.3wherein A is at least one element selected from the group consisting of Pb, Sr and Ca), andA(Cu.sub.1/3 Nb.sub.2/3)O.sub.3(where A is at least one element selected from the group consisting of Pb, Sr and Ca). The main component consists essentially, by weight, of 19.5 to 42.8% of SrTiO.sub.3, 8.0 to 37.6% of PbTiO.sub.3, 4.2 to 33.9% of CaTiO.sub.3, 4.4 to 26.9% of Bi.sub.2 O.sub.3, 4.2 to 13.6% of TiO.sub.2 and 0.5 to 12% of SnO.sub.2. The contents of the secondary components per 100 parts by weight of the main component are 0.02 to 0.50 parts by weight for manganese oxide in terms of MnO.sub.2, 0.1 to 5.0 parts by weight for oxides of rare earth elements in terms of Re.sub.2 O.sub.3, and 0.1 to 5.0 parts by weight for the complex perovskite compound.
公开/授权文献
- US4324907A Extraction process 公开/授权日:1982-04-13
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