| 专利名称： | SEMICONDUCTOR CERAMIC COMPOSITION |
| 公开（告）号： | |
| 公开（公告）日： | 2007-03-01 00:00:00 |
| 申请（专利）号： | WO2005JP14769(WO2007023512) |
| 申请日： | 2005-08-11 00:00:00 |
| 发明（设计）人： | NEOMAX CO LTD (JP)SHIMADA TAKESHI (JP) |
| (申请)专利权（人）： | SHIMADA TAKESHI (JP);MATSUMOTO KEI (JP) |
| 内容： | A BaTiO3 based semiconductor ceramic composition wherein without using Pb, the Curie temperature thereof can be shifted in the positive direction and further the resistivity thereof at room temperature thereof is markedly lowered. In this composition, a part of Ba is replaced with element A1 (at least one of Na, K, Li) and element A2 (Bi), and further Ba is replaced with a specified amount of element Q. Alternatively, a part of Ba is replaced with element A1 (at least one of Na, K, Li) and element A2 (Bi), and further a part of Ti is replaced with a specified amount of element M. Consequently, this composition realizes optimum atomic valence control and enables substantial drop of resistivity at room temperature, thereby being most suitable for use in a PTC thermistor, a PTC heater, a PTC switch, a temperature detector, etc., in particular, a heater for automobile or the like. |
发布日期：2007-08-24 16:07:00