Experimental research on resistance temperature characteristic of conductive composite materials used in large deformation sensor

To research the resistance temperature characteristic of large deformation sensor element produced by the conductive composite materials based on rubber. A series of tests on resistance temperature characteristic of carbon fiber filled conductive silicone rubber are carried out. the results shows that it appears transition temperature during heating-cooling cycle range from 0D to 40D. The composite materials shows Negative Temperature Coefficient of resistance(NTC) phenomenon at temperatures below the transition temperature while it shows Positive Temperature Coefficient of resistance(PTC) phenomenon at temperatures above the transition temperature. The resistance of composite materials gradually decreases, and finally reaches a steady as the temperature cycle.