Abstract
1. The proposed method can be used for determining the thermal conductivity of electrically nonconducting materials at high temperatures (1500–3000°C). 2. The specimens have the shape of cylindrical polyhedrons with an axial opening, in which the heater is placed. 3. The temperature drop across two points on the outside surface is measured by means of photoelectric transducers. 4. The thermal conductivity problem for the chosen specimen geometry is solved in the linear approximation. 5. The maximum error caused by departure from the nonlinear boundary condition on the outside surface has been estimated for the solution obtained. 6. The working equation for the thermal conductivity coefficient allows for wide-range variations of the specimen's dimensions and the experimental temperature.
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