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Kinetic analysis of the crystallization processes in the glasses of the Bi-As-S system.
- Source :
-
Journal of Thermal Analysis & Calorimetry . Oct2012, Vol. 110 Issue 1, p379-384. 6p. - Publication Year :
- 2012
-
Abstract
- Kinetic analysis of the crystallization process in Bi(AsS) and Bi(AsS) glasses was performed based on DSC curves recorded under non-isothermal measurement conditions. Samples were thermally treated at different heating rates in the temperature range 300-770 K. The activation energy of crystallization E and the pre-exponential factor K are determined by the Kissinger method and the characteristic crystallization parameters m and n of investigated glasses by the Matusita method. For both crystallization processes the glass with 4 at.% of Bi is characterized by the mechanism of volume nucleation, which is manifested in the form of two-dimensional growth at the first crystallization process, and as three-dimensional at the second one. On the other hand, in the sample with 6 at.% Bi, the average value of the parameter m is close to one, which indicates one-dimensional crystal growth. Compatibility of the values of the parameters m and n suggests that this sample has a large number of crystallization centers, which do not increase significantly during the thermal treatment. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13886150
- Volume :
- 110
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Thermal Analysis & Calorimetry
- Publication Type :
- Academic Journal
- Accession number :
- 82300942
- Full Text :
- https://doi.org/10.1007/s10973-012-2353-z