BARIUM TITANATE-BASED SEMICONDUCTOR CERAMIC COMPOSITION AND PTC THERMISTOR

Provided is a barium titanate-based semiconductor ceramic composition which contains no Pb, which can have an increased Curie temperature, which exhibits slight deterioration with time, and which has high reliability. The barium titanate-based semiconductor ceramic composition is represented by the...

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1. Verfasser:	KATSU, Hayato
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ARTIFICIAL STONE BASIC ELECTRIC ELEMENTS CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE ELECTRICITY LIME, MAGNESIA METALLURGY REFRACTORIES RESISTORS SLAG TREATMENT OF NATURAL STONE
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Zusammenfassung:	Provided is a barium titanate-based semiconductor ceramic composition which contains no Pb, which can have an increased Curie temperature, which exhibits slight deterioration with time, and which has high reliability. The barium titanate-based semiconductor ceramic composition is represented by the composition formula (Ba 1-x-y-z Sr y (A1Bi) x A2 z )TiO 3 , where A1 is an alkali metal element, A2 is a rare-earth element, and x, y, and z satisfy the following inequalities 0.03 ‰¤ x ‰¤ 0,20, 0.02 ‰¤ y ‰¤ 0.20, 0.0005 ‰¤ z ‰¤ 0.015, and x - 0.10 ‰¤ y ‰¤ (5 / 4)·x. In addition, 0.01 to 0.20 molar parts of Mn per 100 molar parts of Ti is preferably added thereto.