Preparation and Properties of a New Series of PTC Composites

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (3): 470.

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Preparation and Properties of a New Series of PTC Composites

DU Wei-Fang, DU Hai-Qing

Institute of Materials Science and Applied Chemistry, Hunan University, Changsha, 410082

Received:1993-07-10 Online:1994-03-24 Published:1994-03-24

Abstract

Abstract: A new series of composites exhibiting a large positive temperature coefficient (PTC)of resistivity effect have been prepared by incorporating YBa₂Cu₃O_7-x particles into polyethylene matrix.The PTCeffect of YBa₂Cu₃O_7-x/polyethylene composites, which was caused by the volume effect of polyethylene, was maximum with 10 orders of magnitude at specimen with 30 vol% YBa₂Cu₃O_7-x.The temperature at which resistivity increases rapidly depends on the melting point of polyethylene.

Key words: PTC, Polyethylene, YBa₂Cu₃O_7-x

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DU Wei-Fang, DU Hai-Qing. Preparation and Properties of a New Series of PTC Composites[J]. Chem. J. Chinese Universities, 1994, 15(3): 470.

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Preparation and Properties of a New Series of PTC Composites

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