DIFFERENTIAL ADIABATIC SCANNING CALORIMETER

摘要

The present invention generally relates to a differential adiabatic scanning calorimeter (dASC) for simultaneous measurements of the temperature dependence of heat capacity and enthalpy of an unknown sample (liquid or solid) from a comparison with the heat capacity and enthalpy of another known sample (liquid or solid). In particular, the invention allows the determination of small differences in heat capacity and enthalpy of an unknown sample and of a known very similar reference sample. Moreover, the invention allows for an accurate separation between pre-transitional enthalpy variations and true latent heats at first- order or weakly first-order phase transitions of the unknown sample. In addition, the invention relates to calorimeters for controlling temperature differences and heat fluxes in different modes of operation.