Absolute Heat Conduction Calorimeter – a Novel Variant of Quantitative DTA Based on a Calorimetric Assembly of Isolated Container Type with Localized C, K Parameters

An attempt is described to bring about an improved (simplified) version of quantitative DTA by formulating and implementing optimized construction principles of the calorimetric assembly of the instrument. The obtained assembly of isolated container type incorporates two cells with spatially localized and separated C (heat capacity) and K (heat conductance) parameters. Effective isolation of the sample container from the heater and support has resulted in a highly isothermal calorimetric system making possible mathematical modeling of the assembly and thus derivation of formulas for calculating reaction heats, kinetic constants, heat capacities, etc. on the basis of the heat balance equation of the cell in its simplest form. To check the agreement between theory and practice, a metrological attestation of the constructed calorimeter Thermo-500 was carried out using standard substances – metals of high purity in the temperature range 20-500oC.