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Once the sample is heated it breaks down and loses mass. Changes in the sample mass are measured on a high resolution microbalance and recorded along with the temperature. The Cahn TGA is intended to compliment the TGA capabilities of the MRL Chemistry Laboratory. The Cahn TGA has three advantages over the Mettler TGA; it can work at higher temperatures, it can work in more aggressive atmospheres, and it can accommodate bigger samples. It can be used with most gasses and can heat samples to 1500° C. The furnace heats quickly but is slow to cool. This limits the number of tests that can be done in one day. More information is available at: Cahn ThermoMax 400 product detail. If you have any questions, please feel free to contact Joe Doyle at x7925 or at jdoyle@mrl.ucsb.edu. |
The Cahn Thermo Gravimetric Analyzer (TGA) measures the weight loss
of a sample as it is heated. The sample is loaded into a cup suspended
from a micro balance and a furnace is then moved up to cover the sample
cup. Gasses flow through the system to protect the microbalance and
to control the sample chemistry.