Sometimes I am unable determine the required temperature to melt the glass composition. Is there any formula to estimate the glass transition temperature as a function of composition?
As such there is no formula I guess but you can predict the glass transition temperature and other properties of a particular composition using the software called 'SciGlass' by A. Priven and group.
Dear Hima
This is a very good point of research. because if you find this relation for a given material it will not useful for other materials.
@ Atul D Sontakke
Thank you for your response sir.
I need the details to get the better one for the software of SciGlass.
Please mention the details sir.
The software name is 'SciGlass'. You can google this to get the information. This is a paid software. For your information, this software is based on the literature dataset and it predicts the closest possibilities for a given composition. It does not calculate or do any theoretical process to get your data. However, I feel you can do the same by going through related literatures of your sample. It will be more useful than getting the ready made values.
I guess there is no such method/formula to find glass transition temp of the glass sample before synthesis. Better u go through the journals/articles related to the composition of ur sample, it will help u to predict the Tg of the samples.
If any formula exist it is based on emperical relation. In my opinion it would be better to search the literature to find if similar glasses are studied. Except SciGlass' you could try handbook of Mazurin http://books.google.bg/books/about/Handbook_of_glass_data.html?id=MEpUAAAAYAAJ&redir_esc=y
It is generally known (although, right now, I cannot give any references) that glass transition temperature can be ROUGHLY estimated as 2/3 of the liquidus temperature for a given composition in the phase diagram of the system considered. Note that this approach works better for glasses of stoichiometric compositions.
Dear
I think it is not appropriate to CALCULATE the glass transition temperature from the composition itself, because it depends a lot on the processing parameters during preparation of glass. However, there are some reports that may be useful to you, check the following link...
http://www.sciencedirect.com/science/article/pii/S1742706111000225
You may want to check my posts elsewhere at this forum: https://www.researchgate.net/post/How_do_I_maintain_the_same_viscosity_of_a_co-polymer_made_of_DADMAC_and_Acrylamide
A reliable calculation method for the glaze's maturity temperature and the degree of transparency and opacity is the formula unit of Hermann Seger
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