Optical quartz glass as a reference substance for the thermal conductivity coefficient of partially transparent materials

A critical analysis is made of all available literature data on the true (phonon, conductive) coefficient of thermal conductivity of optical quartz glasses which are typical materials partially transparent to thermal radiation. Based on the most reliable of these data, the least squares method is used to derive an equation which approximates the temperature dependence of the thermal conductivity coefficient in the range of $600$–$1500$ K. The possibility of application of optical quartz glass as a reference substance for determining the thermal conductivity coefficient of partially transparent materials under conditions of simultaneous radiative-conductive transfer of energy is substantiated.