碳纤维水泥基复合材料的阻温特性  

Resistivity-temperature behavior of carbon-fiber cement-matrix composites

作　　者：曹震[1] 赵晓华[1] 谢慧才[1] 

机构地区：[1]汕头大学土木工程系,广东汕头515063

出　　处：《功能材料》2003年第4期466-467,共2页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50078032);广东省自然科学基金资助项目(021251);"千百十"人才培养基金资助项目(Q02036)

摘　　要：　研究了碳纤维水泥基复合材料的阻 温特性。发现当温度低于某一特定值时,电阻率随温度的升高而单调降低(NTC效应)。超过此值时,则表现为电阻率随温度升高而大幅度单调增加(PTC效应)。普通水泥基材料不具有相应的阻 温特性。The resistivitytemperature behavior of carbonfiber cementmatrix composites was studied through experimental research. It was shown that the resistivity demonstrates a large increase and the positive temperature coefficient (PTC) effect was observed at an elevated temperature when the composites were heated above a critical temperature. However, the resistivity decreases and presents the negative temperature coefficient (NTC) effect below the critical temperature. This phenomenon was not observed for plain cementbased materials.

关 键 词：碳纤维水泥基复合材料 阻-温特性 NTC效应 PTC效应 

分 类 号：TU528.582[建筑科学—建筑技术科学]