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https://open.uns.ac.rs/handle/123456789/28093
Назив: | Kinetic analysis of the crystallization processes in glasses of the system Bi-As-S | Аутори: | Šiljegović Mirjana Lukić-Petrović Svetlana Štrbac Goran Petrović Dragoslav |
Кључне речи: | chalcogenide glasses, thermal properties, crystallization, crystal growth | Датум издавања: | 2012 | Часопис: | Journal of Thermal Analysis and Calorimetry | Сажетак: | Kinetic analysis of the crystallization process in Bi4(As2S3)96 and Bi6(As2S3)94 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 K0 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. | URI: | https://open.uns.ac.rs/handle/123456789/28093 | ISSN: | 1388-6150 1572-8943 |
Налази се у колекцијама: | PMF Publikacije/Publications |
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проверено 10.05.2024.
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