Chapter 3. Weathering of Binary Alkali Silicate Glasses and Glass-Ceramics

  1. William J. Smothers
  1. Y. Chao and
  2. D. E. Clark

Published Online: 26 MAR 2008

DOI: 10.1002/9780470318782.ch3

Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10

Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10

How to Cite

Chao, Y. and Clark, D. E. (1982) Weathering of Binary Alkali Silicate Glasses and Glass-Ceramics, in Proceedings of the 6th Annual Conference on Composites and Advanced Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 3, Issue 9/10 (ed W. J. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470318782.ch3

Author Information

  1. Ceramics Div., Dept. of Materials Science and Engineering, University of Florida Gainesville, FL 32611

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1982

ISBN Information

Print ISBN: 9780470373972

Online ISBN: 9780470318782

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Keywords:

  • ceramic fiber;
  • horizontal-tube furnace;
  • feasibility;
  • installation;
  • utilized

Summary

Surface degradation of glasses comprised of 33 mol% Na2O-67 mol% SiO2 (33N) and 33 mol% Li2O-67 mol% SiO2 (33L) and glass-ceramics prepared by crystallizing 33L is examined. These materials were weathered in a typical laboratory environment and also in environments consisting of Ar, air, and CO2 with controlled humidity. Infrared reflection spectroscopy (IRRS), scanning electron microscopy (SEM), and X-ray diffraction were used to evaluate surface alterations accompanying weathering. Surface alterations due to weathering are compared with those produced by aqueous corrosion. The reaction product is identified as Na3H(CO3)22H2O. The mechanism of weathering is proposed and discussed in terms of a layer of a concentrated electrolyte (NaOH film) and availability of gas reactants. The morphology of the reaction layers is dependent on the relative humidity and concentration of reactive gases.