METHOD FOR INDIRECT MEASUREMENT OF THERMAL CONDUCTIVITY ACCORDING TO THE DATA OF DIELKOMETRIC MEASUREMENTS Russian patent published in 2023 - IPC G01N25/18 

FIELD: measuring technology.

SUBSTANCE: invention relates to measuring equipment and radio engineering of ultrahigh frequencies and can be used for simultaneous measurement of thermophysical and dielectric parameters of samples. To determine the thermal conductivity, the sample is placed in a coaxial measuring cell, which is placed in a thermostat and connected to a frequency-sweep circuit analyzer. The cell must ensure that the ends of the sample remain parallel, completely filling the cell and tightly fitting to its walls. After holding the sample at a given temperature for a time obviously sufficient to achieve thermal equilibrium, the thermostat setpoint is changed and the time for establishing temperature equilibrium is measured according to the norm of discrepancy of the analyzer readings. Thermal conductivity is calculated using the ratio of the square of the radial thickness of the sample to the measured time interval, density and heat capacity.

EFFECT: possibility of conducting complex studies of material samples by simultaneously measuring the thermophysical and electrophysical characteristics of the substance under study.

1 cl, 2 dwg