Surface crystallization of silicate glasses:: nucleation sites and kinetics

In this paper we review some pertinent research aimed at understanding surface nucleation from both qualitative and quantitative points of view, The majority of quantitative studies discuss the crystal nucleation kinetics of soda-lime-silica glasses and alkali-free silicate (cordierite, anorthite and diopside) glasses. We emphasize the kinetics of surface nucleation and consider the effects of surface quality, tips, cracks and scratches, foreign particles and surrounding atmosphere on crystallization. Related nucleation mechanisms are discussed. (C) 2000 Elsevier Science B.V. All rights reserved.