MEASUREMENT OF THE THERMAL DIFFUSIVITY , HEAT CAPACITY AND THERMAL CONDUCTIVITY COEFFICIENTS OF NITRATE SALTS IN THE SOLID AND LIQUID STATES, IN THE TEMPERATURE RANGE UP TO 500 K

Abstract

Measurement of the thermal properties: thermal activity, thermal diffusivity, volumetric heat capacity and thermal conductivity coefficients are of great importance for many practical applications, and also for pure scientific purposes. The specific heat is reLated to the structure of the material, and the thermal

conductivity

motion.

coefficient is related to its thermal

Due to the lack of a complete theory of the liquid state, measurement of the physical properties in general, and thermal properties in particular, helps the understanding of the nature of the structure of matter and the thermal motion iA. it.

In this measurement of the AC-heated

work, an experimental set-up for the the mentioned thermal properties, using wire technique waa constructed. In this

technique, a wire is illllll8rsed iA the investigated medium, and heated ·by an AC-current of a certain frequency. Measurement of the amplitude of the third harmonic signal enables one to simultaneously measure the mentioned four thermal properties.