/ TGA

THERMOGRAVIMETRIC ANALYSIS (TGA)

A thermogravimetric analysis measures weight changes as a function of temperature in a controlled atmosphere (usually air or nitrogen). When a material is heated up, it can gain or loose mass because of various physical or chemical processes (drying, oxidation, degassing).

Uses

-Determine a degradation temperature

-Measure the humidity content, the decomposition kinetics or the thermal stability of materials

-Compare raw materials

 

 

Advantages:

-Inexpensive and well-known
-A very small amount of material is needed
-Large temperature range (25 to 900o C)

Limitations:

-Data interpretation can be difficult if the sample is complex
-Limited information on chemical composition

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