1992•Chinese Science BulletinRequires access

MECHANISM OF THE PTC EFFECT OF V 2 O 3 -POLYETHYLENE COMPOSITES

杜伟坊, 杜海清

Abstract

The positive temperature coefficient (PTC) effect of ceramics has been widely used in temperature sensors, protective switches and so on, which requests large positive temperature coefficients in narrow region above the curie-point temperature and low resistivities below the curie-point temperature. At present, PTC thermistors are fabricated by means of doping the BaTiO_3 to produce a PTC effect by the existence of accep.tor states or elec

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Key concepts: Thermistor, Curie temperature, Temperature coefficient, Materials science, Composite material, Doping, Ceramic, Condensed matter physics