ABSTRACT
ATD is the method in which the difference in temperature between the sample to study and one compound of reference is measured as a function of temperature when both compounds are submitted to the same program of variation of it. DSC is the method in which one measures the difference of energy necessary to keep the sample and the reference at the same temperature when they are submitted to the same program of variation of temperature. The results of these methods are the matter of curves called thermograms. From a general viewpoint, the position, the slope, the height and the area of the peak are characteristic of the transition or the reaction responsible for the obtained curve. The chapter recalls that the study of thermograms permits obtaining the following types of information, the temperature at which the transformation or the reaction evolves, the heat of transformation and its rate. The applications of ATD and DSC are numerous and of different natures. They concern proximate and quantitative analysis and the study of some chemical reactions.
