一类新型PTC复合材料的制备及性能  

Preparation and Properties of a New Series of PTC Composites

作　　者：杜伟坊 杜海清[1] 

机构地区：[1]湖南大学材料科学及应用化学研究所

出　　处：《高等学校化学学报》1994年第3期470-471,共2页Chemical Journal of Chinese Universities

摘　　要：一类新型ＰＴＣ复合材料的制备及性能杜伟坊，杜海清（湖南大学材料科学及应用化学研究所，长沙，４１００８２）关键词正温度系数，聚乙烯，ＹＢａ_２Ｃｕ_３Ｏ_（７－ｘ）具有正温度系数（ＰＴＣ）的材料在其转化温度附近具有电阻率大幅度上升的特点，因而在温度检测与?..A new series of composites exhibiting a large positive temperature coefficient (PTC)of resistivity effect have been prepared by incorporating YBa_2Cu_3O_(7-x) particles into polyethylene matrix. The PTC effect of YBa_2Cu_3O_(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% YBa_2Cu_3O_(7-x). The temperature at which resistivity increases rapidly depends on the melting point of polyethylene.

关 键 词：正温度系数 聚乙烯 钇化合物 

分 类 号：O632.12[理学—高分子化学]