Semiconductor ceramic, semiconductor ceramic element and circuit protection element

It is an object of the present invention to provide a semiconductor ceramic and a semiconductor ceramic element each having a room temperature specific resistance of 3 .cm or lower and having a resistance temperature characteristic of 9%/DEG C or more. The semiconductor ceramic of the present invent...

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Bibliographische Detailangaben
Hauptverfasser:	OKAMOTO, TETSUKAZU, HIROTA, TOSHIHARU, NABIKA, YASUHIRO
Format:	Patent
Sprache:	eng
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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Beschreibung
Zusammenfassung:	It is an object of the present invention to provide a semiconductor ceramic and a semiconductor ceramic element each having a room temperature specific resistance of 3 .cm or lower and having a resistance temperature characteristic of 9%/DEG C or more. The semiconductor ceramic of the present invention, is characterized in that a ratio of R1/(R1+R2), in which R1 is a transgranular resistance value of the crystal particles and R2 is an intergranular resistance value of the crystal particles and R1+R2 is an overall resistance value representing a sum of R1 and R2, is 0.35 to 0.85.