Surface Devitrification and the Growth of Cristobalite in Borofloat® (Borosilicate 8330) Glass

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Mogulkoc, Berker and Knowles, Kevin M. and Jansen, Henri V. and Brake ter, Marcel and Elwenspoek, Miko C. (2010) Surface Devitrification and the Growth of Cristobalite in Borofloat® (Borosilicate 8330) Glass. Journal of the American Ceramic Society, 93 (9). pp. 2713-2719. ISSN 0002-7820

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Abstract:Borofloat® (borosilicate 8330) glass is an important type of inorganic glass, both scientifically and commercially. During prolonged heat treatment of this glass above its glass transition temperature of 525°C, heterogeneous nucleation, and growth of cristobalite crystals occur. The kinetics and morphology of this crystal growth have been studied for heat treatment temperatures at and above 660°C. The activation energy for crystal growth is estimated to be 185±10 kJ/mol. This is attributed to the diffusion of boron, rather than sodium, being the rate-limiting step within the borosilicate framework. Contact with the atmosphere is shown to initiate the nucleation of cristobalite crystals, while deposition of a thin silicon nitride surface coating on the glass helps to prevent this nucleation.

Item Type:Article
Copyright:© 2010 The American Ceramic Society
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/73474
Official URL:http://dx.doi.org/10.1111/j.1551-2916.2010.03793.x
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