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Crystallization kinetics of SrBi2B2O7 glasses by non-isothermal methods

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Abstract

Transparent glasses of SrBi2B2O7 (SBBO) were fabricated via the conventional melt-quenching technique. The amorphous and the glassy nature of the as-quenched samples were, respectively, confirmed by X-ray powder diffraction (XRD) and differential scanning calorimetry (DSC). The glass transition (T g) and the crystallization parameters [crystallization activation energy (E cr) and Avrami exponent (n)] were evaluated under non-isothermal conditions using DSC. There was a close agreement between the activation energies for the crystallization process determined by Augis and Bennet and Kissinger methods. The variation of local activation energy [E c(x)] that was determined by Ozawa method, decreased with the fraction of crystallization (x). The Avrami exponent (n(x)) increased with the increase in fraction of crystallization (x) suggesting that there was a change over in the crystallization process from the surface to the bulk.

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  1. Materials Research Centre, Indian Institute of Science, Bangalore, 560 012, India

    Koushik Majhi & K. B. R. Varma

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  1. Koushik Majhi
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  2. K. B. R. Varma
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Correspondence to K. B. R. Varma.

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Majhi, K., Varma, K.B.R. Crystallization kinetics of SrBi2B2O7 glasses by non-isothermal methods. J Therm Anal Calorim 98, 731–736 (2009). https://doi.org/10.1007/s10973-009-0105-5

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  • DOI: https://doi.org/10.1007/s10973-009-0105-5

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