Reference temperature selection when the heat conducttvity coefficient measured

Previous the method validation of the heat conductivity coefficient (HCC) measurement of solids is considered. The method is based on solving quasi-inverse multivariate problem of heat conductivity in rectangular parallelepiped, which is heated with the radiant flux from one of edges and radiated freely with the constant temperature from all sides into the medium. With the theoretical method validation one assumed the constancy of HCC. Such assumption is right if the temperature differences are small in sample. With great temperature differences it is necessary to refer the measured values of HCC to the definite temperature (reference temperature). In the given paper the reference temperature selection with the linear dependence of HCC on the temperature is founded