• Influence of seeding on crystallization behaviour of BaNaB9O15 glasses

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      https://www.ias.ac.in/article/fulltext/boms/032/01/0093-0098

    • Keywords

       

      Borates; glasses; nonlinear optic materials; crystallization; DSC.

    • Abstract

       

      Transparent BaNaB9O15 (BNBO) glasses were fabricated via the conventional melt-quenching technique. X-ray powder diffraction (XRD) followed by differential scanning calorimetric (DSC) studies confirmed the amorphous and glassy nature of the as-quenched samples, respectively. The effect of seeding on the crystallization of BNBO glasses was studied by non-isothermal DSC method and was modeled using the Johnson–Mehl–Avrami and Ozawa equations. The activation energy for seeded glasses decreased with the increase in fraction of crystallization. The values for the onset of crystallization and Avrami exponent were found to be lower for seeded samples which were associated with the heterogeneous nucleation and epitaxial processes.

    • Author Affiliations

       

      Rahul Vaish1 K B R Varma1

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

       

© 2017-2019 Indian Academy of Sciences, Bengaluru.