Influence of seeding on crystallization behaviour of BaNaB9O15 glasses

Vaish, Rahul and Varma, KBR (2009) Influence of seeding on crystallization behaviour of BaNaB9O15 glasses. In: Bulletin of Materials Science, 32 (1). pp. 93-98.

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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.

Item Type:	Journal Article
Publication:	Bulletin of Materials Science
Publisher:	Indian Academy of Sciences
Additional Information:	Copyright for this article belongs to Indian Academy of Sciences.
Keywords:	Borates; glasses; nonlinear optic materials; crystallization; DSC.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	21 Aug 2009 11:32
Last Modified:	19 Sep 2010 05:34
URI:	http://eprints.iisc.ac.in/id/eprint/20852

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