摘要
将过渡金属氧化物（Ｖ２Ｏ３、Ｖ２Ｏ５）分别与高密度聚乙烯（ＨＤＰＥ）、低密度聚乙烯（ＬＤＰＥ）、聚丙烯（ＰＰ）复合制备热敏电阻材料，其室温电阻率最低可达０．４Ω·ｃｍ，ＰＴＣ效应（ρｍａｘ／ρ２５℃）高达１０１０数量级。本文研究了导电微粒、聚合物的种类、数量对室温电阻率和ＰＴＣ效应的影响规律，并对复合材料的微观结构进行分析，用电子隧道效应理论解释了材料的ＰＴＣ效应。
Two kinds of vanadium oxides were incorporated polymer matrices (HDPE, LDPE, PP) to produce composite materials with low room temperature resisivities (down to 0.4Ω. cm) and sizable positive temperature coefficient (PTC) resistance effects (up 10 orders of magnitude). The influence of V2O3 content, polymers against room temperature resistivity and PTC effect were investigated in detail. In addition, the microstructure of composite was analyzed, and to explain the PTC effect the electron tunneling was proposed.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
1994年第5期20-25,共6页
Journal of South China University of Technology(Natural Science Edition)
基金
广东省自然科学基金
关键词
热敏电阻
复合材料
氧化钒
电阻材料
s: composite materials
positive temperature cofficient thermistors
vanadium oxides.
