Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 97: Issue 2
Non-isothermal crystallization kinetics of some basaltic glass-ceramics containing CaF2 as nucleation agent
Authors:
C. Păcurariu “Politehnica” University of Timişoara Faculty of Industrial Chemistry and Environmental Engineering P-ţa Victoriei No. 2 300006 Timisoara Romania

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R. Lazău “Politehnica” University of Timişoara Faculty of Industrial Chemistry and Environmental Engineering P-ţa Victoriei No. 2 300006 Timisoara Romania

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I. Lazău “Politehnica” University of Timişoara Faculty of Industrial Chemistry and Environmental Engineering P-ţa Victoriei No. 2 300006 Timisoara Romania

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R. Ianoş “Politehnica” University of Timişoara Faculty of Industrial Chemistry and Environmental Engineering P-ţa Victoriei No. 2 300006 Timisoara Romania

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B. Tiţa University of Medicine and Pharmacy “Victor Babeş” Faculty of Pharmacy P-ţa E. Murgu no. 2 Timisoara Romania

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Pages:
507–513
Online Publication Date:
28 Aug 2009
Publication Date:
01 Aug 2009
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-009-0369-9
Keywords:
Crystallization kinetics; Glass-ceramics; Nucleation agents
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Abstract  

The crystallization mechanism of the glass-ceramics obtained from Romanian (Şanoviţa) basalt in the presence of 3 and 5% CaF2 as nucleation agent has been investigated under non-isothermal conditions using DTA technique. The activation energies of the crystallization processes were calculated using the Kissinger-Akahira-Sunose, Ozawa-Flynn-Wall, Starink and Tang isoconversional methods. The monotonous decreases in the activation energy (Ea) with the crystallized fraction (α) confirms the complex mechanism of the glass-ceramics crystallization process. It has been proved that the Johnson-Mehl-Avrami model cannot be applied for the studied glass-ceramics crystallization process.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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