Testing‎ > ‎Thermal‎ > ‎


Thermogravimetric Analysis (TGA)

 Thermogravimetric analysis measures the mass of a sample as a function of temperature while it is subjected to a controlled temperature program.  The TGA instrument consists of a microbalance, low-mass furnace, and temperature sensor.  Instruments typically have a temperature range of ambient to 1000oC. 

 In the dynamic TGA experiment the sample is heated at a defined rate, typically 10oC/min, and mass loss is monitored as a function of temperature.

 In the isothermal TGA experiment the sample is held at constant temperature and the mass loss is monitored as a function of time.

 TGA analyses can be run under different atmospheres:

 A nitrogen atmosphere is typically used to evaluate thermal decomposition under a non-oxidative atmosphere.  This analysis can evaluate material behavior under processing conditions. Air or oxygen is typically used to evaluate performance under an oxidative environment.  Results from these analyses can be used to evaluate long-term aging.TGA can be used to characterize any material (liquid, solid, or powder) that exhibits a weight change due to decomposition, oxidation, or dehydration.