METHOD OF MEASURING SPECIFIC HEAT CAPACITY OF MATERIALS Russian patent published in 2020 - IPC G01N25/20 G01K17/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement equipment of thermophysical properties of substances, is intended for measurement of specific heat capacity of materials and can be used in metrology, in industry, in scientific research and for development of new materials with preset properties. Disclosed is a method of measuring specific heat capacity of materials, according to which container, reference measure and analyzed sample are made with given accuracy of identical weight. Note here that container and reference gauge are made from the same material with specific heat capacity known at preset accuracy; heating element and primary temperature transducer are built into container. Total heat capacities of the heating element and the primary temperature transducer are considered to be known with given accuracy. Container is placed in an adiabatic calorimeter; a standard measure is placed in the container; initial temperature of the container and measures are set. Due the heating element of the container, a specified amount of heat is introduced into the container with a measure the specified number of times; at that, the total introduced amount of heat should be such that the maximum heating of the container does not exceed the specified value. After each introduction of heat, the temperature of the container established after introduction of specified heat is recorded and temperature increase is calculated relative to its initial value. Dependence of the amount of total heat input on the total temperature increase for the reference measure is approximated and a derivative of the obtained relationship is found. Measured sample is replaced with operations identical to those of the reference measure. Dependence of the amount of total heat input on the total temperature increase for the analyzed sample is approximated, the derivative of the obtained relationship is found and the unknown specific heat capacity of the analyzed sample is calculated.

EFFECT: high accuracy of measurements with simultaneous expansion of the dynamic range and nomenclature of analyzed materials.

1 cl, 4 dwg