Differential thermal analysis (DTA) is a thermal method for material analysis. DTA uses the fact of a characteristic energy conversion during phase transition for qualitative and quantitative analysis. The measurement is based on a comparison of the temperatures of the sample and a selected reference substance in a symmetrical measuring chamber. The reference substance does not exhibit any phase transitions in the temperature range to be examined. With a constant energy supply (heat) through the furnace, the temperature under both crucibles (sample and reference) is measured using temperature sensors and the difference is recorded. Such a temperature difference only appears during phase transitions, and conclusions about the composition of the sample can therefore be drawn from the curve.
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