TEMPERATURE COEFFICIENT RESISTANCE OF COMPOSITE SYSTEMS “CERAMIC-CARBON” WITH NANODIMENSIONAL CARBON HEADERS

The work is devoted of the experimental study the dependence of electrical resistance, the thermal conductivity coefficient and porosity of the electro conductive composite materials (ECM) system “ceramics-carbon” on the content of nanosized carbon fillers and technological regimes of manufacture. The analytical dependences of the specific electric resistance on the deformed state of the ECM in the percolation theory has been analyzed. The results The results of experimental studies have shown that the decrease of the dispersion of the particles of the conductive phase of the composite (usage of graphite nanoplates instead of thermally extended graphite) was able to significantly reduced the hysteresis of the curves of the resistance of the electric resistance to the temperature when heated and cooled. The influence of the change in the volume of the dielectric component of the ECM on the electrical resistance at a temperature change of 20-620 °C has been experimentally confirmed