Our group are investigating the influence of malonic acid on CaCO3 phase changes (calcite, aragonite, vaterite). It is evident that the carboxylic acid used (up to 20.00 ppm) was able to alter both the morphology and the crystalline phase of the CaCO3 polymorph.
However, it is difficult to analyse the phase transition through TG-DTA, as shown in the files attached.
If you could help us with the DTA analysis please.
Thanks.
you can use
Article Transformation in calcium carbonate stones: Some examples
Dear Stefanus Muryanto, these documents deals with the use of DSC for the purpose you are working on. If you have the enthalpies for such transitions, what is the problem in the interpretation, since each phase hase its specific thermodynamics parameters. My Regards
https://link.springer.com/article/10.1023/A:1010158918395
https://link.springer.com/article/10.1007/BF02135013
https://doi.org/10.1016/0040-6031(95)02748-3
https://doi.org/10.1016/j.pepi.2018.05.002
Dear Stefanus Muryanto,
I think the plots you have shown are DSC thermograms and the following article may help you.
doi: 10.1023/A:1010158918395
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