Nov 1, 1984
Journal of Physics E: Scientific Instruments
A detailed analysis is given of a pressure-controlled differential scanning calorimeter. Mathematical formulae describing the thermodynamic significance of the calorimetric signal are presented for general use and for the particular case of first-order phase transitions. In the latter case the shape of the thermogram of fusion of a pure substance is analysed. The analysis has shown that the slope of the thermogram of fusion depends not only on both the calorimeter properties and rate of pressure variations but also on the dp/dT of the substance under investigation. A formula is derived for determination of the critical magnitude of the sample of substance under investigation.