Abstract
Two approaches for the analysis of DSC and DTA curves have been examined experimentally using pure indium and anthracene as well as by electric and infrared pulse heating of the sample container. Melting curves of triangular shape were obtained. The approach based on the theory of heat transfer was found to be valid in the melting of pure substances. On the other hand, the other approach based on the linear theory of control and measurement was found to be valid in the electric heating and the infrared irradiation experiments by examining linearity and superposition. The differing results depending on conditions are explained by the fundamental equation of heat transfer and apparatus design.
