Chapter 28. Crystallization and Characterization of Y2O3-SiO2 Glasses
- John B. Wachtman Jr
Published Online: 26 MAR 2008
Copyright © 1988 The American Ceramics Society, Inc.
12th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 9/10
How to Cite
Drummond, C. H., Lee, W. E., Sanders, W. A. and Kiser, J. D. (1988) Crystallization and Characterization of Y2O3-SiO2 Glasses, in 12th Annual Conference on Composites and Advanced Ceramic Materials, Part 2 of 2: Ceramic Engineering and Science Proceedings, Volume 9, Issue 9/10 (ed J. B. Wachtman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470310502.ch28
- Published Online: 26 MAR 2008
- Published Print: 1 JAN 1988
Print ISBN: 9780470374818
Online ISBN: 9780470310502
- thermal gravimetric analysis (TGA);
- chemical analysis
Results of crystallization studies on glasses with 20–40 mol% Y2o3 in the Y2O3-SiO2 system are presented. Glasses were melted in W crucibles at 1900°C-2100°C in 1 and 50 atm N2. Phase identification by X-ray diffraction and TEM indicated crystallization of the δ, γ, γ1 and β-Y2Si2O7, depending on melting and quenching conditions. Characterization of glasses was by differential thermal analysis (DTA), thermal gravimetric analysis (TGA) and chemical analysis including energy dispersive spectroscopy in the TEM. Heat treatment in an air atmpsohere from 1100°-1600°C increased the amount of crystallization and resulted in formation of Y2SiO5, cristobalite and polymorphs of Y2Si2O7. The effect of 5 and 10 wt% ZrO2 additions on crystallization was also studied.