Differential thermal analysis:

As shown in Figure 21.03, analysis of a DTA curves reveals several features related to physical and chemical changes that occur due to increase in temperature, viz., Glass transition, Crystallization of amorphous phase (exothermic), melting (endothermic), Oxidation (exothermic), and decomposition of the materials.

Figure 21.03: Typical DTA curve showing various information of a materials.

Applications of DTA:

1. To construct phase diagrams and study phase transitions.

2. To find an enthalpy (ΔH)