发明授权
US3987347A Temperature stable monolithic ceramic capacitor with base metal
electrodes
失效
具有贱金属电极的温度稳定的单片陶瓷电容器
- 专利标题： Temperature stable monolithic ceramic capacitor with base metal electrodes
- 专利标题（中）： 具有贱金属电极的温度稳定的单片陶瓷电容器
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申请号： US582060申请日： 1975-05-29
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公开(公告)号： US3987347A公开(公告)日： 1976-10-19
- 发明人: Ian Burn
- 申请人： Ian Burn
- 申请人地址： MA North Adams
- 专利权人： Sprague Electric Company
- 当前专利权人： Sprague Electric Company
- 当前专利权人地址： MA North Adams
- 主分类号： H01G4/12
- IPC分类号： H01G4/12
摘要：
A monolithic ceramic capacitor having base metal electrodes is described that meets the standard TCC limits of .+-. 15% from -55.degree. C to 125.degree. C. The ceramic includes small quantities of acceptor dopants, particularly manganese added to barium titanate and an alkali-earth-metal-zirconate. When fired from 1250.degree. C to 1400.degree. C in a partial oxygen atmosphere of 10.sup..sup.-7 to 10.sup..sup.-9 atmospheres of oxygen, a liquid phase sintering occurs during which the titanate-zirconate grains do not grow and there is formed a concentration gradient of the zirconate near the grain surfaces while a liquid manganese titanate forms a second and immiscible phase in the grain boundary regions.
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