Dear Researchers, I recently went through my DTA analysis for my sample. In that, I found the sample weight is increasing with temperature increase. I never found like that graph in any literature. How do I understand the data? Can heat flow with a temperature graph be useful?
What can we calculate using TGA data?
Is it possible to calculate the glass transition temperature?
Please guide
Thanks in advance
Dear Aditya Vamshi
In TGA, weight gain is usually due to oxidation, adsorption or chemical reactions; to understand this, it is necessary to control the analysis atmosphere (e.g. presence of oxygen) and material properties. DTA/DSC data can be useful in understanding the cause of weight gain; for example, oxidation may show an exothermic peak, while adsorption may show an endothermic peak. Mass loss, decomposition temperatures, reaction kinetics and ash content can be calculated with TGA, but the glass transition temperature (Tg) is determined by DSC, not TGA. Supporting your data with DTA/DSC will provide clearer results.
Kind Regards.
Özgün Ceren Akbay Thank you for your valuable answer. It helped me alot.
My sample is a glass material. What do you tell about DTA for glass Sample, Does it gain weight or lose weight with increase in temperature?
In rare cases, glass materials can gain weight. This is usually due to the oxidation of metal ions or reduced species (e.g. Fe²⁺) contained in the glass by reacting with oxygen. In addition, gas adsorption from the environment at certain temperatures can also cause weight gain, but this is quite rare. However, pure and stable glass materials (e.g. silica glass) generally do not show a significant weight change as the temperature increases, because such materials are chemically very stable.
- Badges
- Science method
- Similar topics
- Biological Science
- Ecology