Thermal expansion of artificial graphites in the temperature range 293–1650 K

The article presents the results of studying the thermal expansion of MPG-6 and AXF-5Q graphites and graphite composite based on 13C isotope in the temperature range 293–1650 K. Measurements were performed with dilatometric method in DIL-402C unit manufactured by NETZSCH (Germany), with the accuracy of (1÷4)×10−7 K−1. Approximation dependences of average integral coefficient of linear expansion on temperature have been obtained and reference tables calculated. It is shown that the coefficient of thermal expansion of 13C composite is much lesser than for MPG-6 and AXF-5Q. The explanation of this phenomenon is provided in the paper.