Study into melting-crystallization of silver thiogallate by the statistical thermal analysis method

The influence of heat treatment of a liquid phase on “melting-crystallization” processes of silver thiogallate (AgGaS 2 ) having chalcopyrite structure I , has been studied by the method of statistical thermal analysis (STA). It is shown that the melting temperature of solid phase ( T m ) increases...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2010-07, Vol.101 (1), p.5-9
Main Authors: Kidyarov, B. I., Nikolaev, I. V.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Asymptotic properties
Chalcopyrite
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Measurement Science and Instrumentation
Melts
Nucleation
Overheating
Physical Chemistry
Polymer Sciences
Silver
Supercooling
Thermal analysis
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Summary:The influence of heat treatment of a liquid phase on “melting-crystallization” processes of silver thiogallate (AgGaS 2 ) having chalcopyrite structure I , has been studied by the method of statistical thermal analysis (STA). It is shown that the melting temperature of solid phase ( T m ) increases non-monotonic from 970 °C due to rise in the preliminary melt overheating, and T m reaches asymptotically 1010 °C. The equilibrium melting-crystallization temperature ( ) has been defined as 989.2 °C. It is also found an extreme dependence of the melt supercooling on its overheating. The two curves of irregular dependence of nucleation rate on melt supercooling have been plotted at different melt overheating.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-010-0815-8