What is the difference between a differential scanning calorimeter and a differential thermal analyzer

DTA (differential thermal analyzer) can only perform qualitative or semi-quantitative analysis, while DSC (differential scanning calorimeter) can perform strict quantitative analysis, because DTA obtains the relationship between deltaT and temperature T, while DSC obtains Because of the relationship between deltaH and T, the differential thermal analyzer cannot perform quantitative analysis, while the differential scanning calorimeter can.

The trend of the curves measured by the differential scanning calorimeter and the differential thermal analyzer is roughly the same, that is, the physical meaning is different. The differential scanning calorimeter measures the power difference between the sample and the reference under the condition of program control temperature. The relationship between temperature, and the differential thermal analyzer measures the relationship between the temperature difference between the sample and the reference material and the temperature or time under the program-controlled temperature condition. Judging from the knowledge of thermal and thermal systems, their curves are the same. During the heating process, the heating rate when the sample starts to react is inconsistent with the programmed heating rate, because the heating rate when the sample starts to react may not keep up with the programmed heating rate at first, resulting in a certain lag in temperature.

The differential scanning calorimeter (DSC) determines the temperature and heat flow associated with the material transformation as a function of time and temperature. The instrument also provides quantitative and qualitative data on the process of material heat absorption (heat absorption) and exotherm (heat dissipation) during physical transformations (caused by phase changes, melting, oxidation, and other heat-related changes).

Material properties that can be detected by a differential scanning calorimeter: