Thermal Conductivity Measurement of Semitransparent Media at Temperatures from 300 to 800 K by Hot—Wire Method

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Thermal conductivity measurement of semitransparent media at temperatures from 300 to 800 K by hot-wire method

In this paper,a new measurement technique for determining thermal conductivity of semitransparent media in the temperature range 300-800 K is reported.The experimental setup is based on the step power forced transient hot wire technique.It is assumed that the radiative contribution to the heat transfer process arises from emission,not from absorption.In this case,application of the"thermal quadruples"method allows a very simple construction of analytical models of the experimental setup.The parameter sensitivity analysis demonstrates that the thermal conductivity of semitransparent media can be determined from the hot wire temperature response. The experimental results of a kind of glass between 300 and 800 K are presented.