Homogeneous and Heterogeneous Crystal Nucleation in Glass of the Li 2 O–SiO 2  System

G. A. Sycheva

doi:10.1134/S1087659618030161

Homogeneous and Heterogeneous Crystal Nucleation in Glass of the Li₂O–SiO₂ System

Authors: Sycheva G.A.¹
Affiliations:
1. Grebenshchikov Institute of Silicate Chemistry
Issue: Vol 44, No 3 (2018)
Pages: 183-191
Section: Article
URL: https://journals.rcsi.science/1087-6596/article/view/216482
DOI: https://doi.org/10.1134/S1087659618030161
ID: 216482

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Abstract
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Abstract

The results of studying the kinetics of homogeneous (spontaneous) and heterogeneous (catalyzed) crystal nucleation in silicate glass is presented for glasses in the Li₂O–SiO₂ system. Nucleation is catalyzed via the photosensitive mechanism by adding poorly soluble impurities, shifting the glass composition towards the higher content of one of the components (autocatalysis), and by passing steam through the glass melt. The fundamental characteristics of crystal nucleation are obtained. The composition ranges with the maximum and minimum steady-state crystal nucleation rates are identified.

Keywords

Li₂O–SiO₂ glass, spontaneous nucleation, critical nucleus size, surface energy of critical nucleus, difference between the Gibbs free energies of glass and a crystal, catalyzed bulk nucleation, effect of bubbles, effect of water on the kinetics of crystal nucleation, effect of poorly soluble impurities on crystal nucleation in glass

About the authors

G. A. Sycheva

Grebenshchikov Institute of Silicate Chemistry

Author for correspondence.
Email: Sycheva_galina@mail.ru
Russian Federation, St. Petersburg, 199034

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