A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
SEMICONDUCTOR CERAMIC COMPOSITION
The invention intends to provide, in BaTiO 3 semiconductor porcelain composition, a semiconductor porcelain composition that, without using Pb, can shirt the Curie temperature to a positive direction and can significantly reduce the resistivity at room temperature. According to the invention, when Ba is partially substituted by an A1 element (at least one kind of Na, K and Li) and an A2 element (Bi) and Ba is further substituted by a specific amount of a Q element, or when Ba is partially substituted by an A1 element (at least one kind of Na, K and Li) and an A2 element (Bi) and Ti is partially substituted by a specific amount of an M element, the optimal valence control can be applied and whereby the resistivity at room temperature can be significantly reduced. Accordingly, it is optimal for applications in a PTC thermistor a PTC heater, a PTC switch, a temperature detector and the like, and particularly preferably in an automobile heater.
SEMICONDUCTOR CERAMIC COMPOSITION
The invention intends to provide, in BaTiO 3 semiconductor porcelain composition, a semiconductor porcelain composition that, without using Pb, can shirt the Curie temperature to a positive direction and can significantly reduce the resistivity at room temperature. According to the invention, when Ba is partially substituted by an A1 element (at least one kind of Na, K and Li) and an A2 element (Bi) and Ba is further substituted by a specific amount of a Q element, or when Ba is partially substituted by an A1 element (at least one kind of Na, K and Li) and an A2 element (Bi) and Ti is partially substituted by a specific amount of an M element, the optimal valence control can be applied and whereby the resistivity at room temperature can be significantly reduced. Accordingly, it is optimal for applications in a PTC thermistor a PTC heater, a PTC switch, a temperature detector and the like, and particularly preferably in an automobile heater.
SEMICONDUCTOR CERAMIC COMPOSITION
HALBLEITERKERAMIKZUSAMMENSETZUNG
COMPOSITION CÉRAMIQUE SEMI-CONDUCTRICE
SHIMADA TAKESHI (author) / MATSUMOTO KEI (author) / TERAO KOICHI (author) / TOJI KAZUYA (author) / NISHIKAWA KAZUHIRO (author)
2016-07-27
Patent
Electronic Resource
English
| European Patent Office | 2017
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| European Patent Office | 2015