Results of Studies of Thermal Properties of Promising Materials

Results of measurements of the temperature coefficient of linear expansion and the specific heat of tungsten, copper, silver, molybdenum, beryllium, sapphire, and TERMAR DF-KO carbon–carbon composite are presented. Studies of all these materials were made on the state primary standards at the D. I. Mendeleyev Institute for Metrology (VNIIM) in recent years. The stability of the properties of the materials was analyzed and the suitability of using these materials for fabrication of means for reproduction and transfer of thermal units for support of the reliability of measurements has been established.