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Kinetics of non-isothermal crystallization of some glass-ceramics based on basalt

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Abstract

The crystallization kinetics of some glass-ceramics obtained from Romanian (Şanoviţa) basalt has been studied in non-isothermal conditions using DTA technique. The activation energies of the crystallization processes were calculated using the isoconversional methods Kissinger-Akahira-Sunose and Ozawa-Flynn-Wall. The results obtained show a dependence of the activation energy (E α) on the crystallized fraction (α) that proves 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. The effect of 2% TiO2 as nucleating agent upon the crystallization kinetics and upon the microstructure of the studied glass-ceramics was analyzed.

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Authors and Affiliations

  1. Faculty of Industrial Chemistry and Environmental Engineering, Politehnica’ University of Timişoara, P-ţa Victoriei No. 2, 300006, Timişoara, Romania

    C. Păcurariu, R. I. Lazău & I. Lazău

  2. Faculty of Pharmacy, University of Medicine and Pharmacy ‘Victor Babeş’, P-ţa E. Murgu no. 2, Timişoara, Romania

    D. Tiţa

Authors
  1. C. Păcurariu
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  2. R. I. Lazău
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  3. I. Lazău
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  4. D. Tiţa
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Correspondence to C. Păcurariu.

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Păcurariu, C., Lazău, R.I., Lazău, I. et al. Kinetics of non-isothermal crystallization of some glass-ceramics based on basalt. J Therm Anal Calorim 88, 647–652 (2007). https://doi.org/10.1007/s10973-006-8024-1

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