The Electrical Conductive Effect of Nickel-coated Graphite/Two-component Silicone-rubber Sealant

作     者：胡圣飞 LI Hui CHEN Xiangxing ZHANG Chong LIU Zuifang 

作者机构：School of Materials Science and Engineering Faculty of Light Industry Hubei University of Technology Hubei Provincial Key Laboratory of Green Materials for Light Industry Life Scan Scotland Limited A Johnson & Johnson Company 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2013年第28卷第3期

页      面：429-436页

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Funded by Wuhan Science and Technology Bureau (No.200710321090-18) 

主　　题：two-component silicone-rubber nickel-coated graphite volume resistivity electric current cyclic strain 

摘      要：Nickel-coated graphite particles and two-component silicone-rubber were compounded to form a conductive composite system. The electrical volume resistivity of the composites were examined and compared under constant tensile strains, cyclic heating-cooling, electric field and repeated cyclic tensile strains in order to study the mechanism of electrical conductivity behaviors of the conductive composites under stress, temperature and current. The results showed that a peak value of the electrical resistivity appeared previously and then gradually increasing with increasing tensile strain. The electrical resistivity displayed positive temperature coefficient effect during the temperature increasing and decreasing. Applying 5A direct current to the conductive composites lesulted in an increase in the electrical resistance immediately, but no changes were detected under lower currents. Under the repeated cyclic strain, the peak value of the electrical resistivity of each cycle increased with the test cycle. All the electrical resistivity changes were attributed to the conductive networks broken-up and rebuilt in the conductive composites.