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Environmental Effects in Gel Derived Silicates

Published online by Cambridge University Press:  15 February 2011

L.L. Hench
L.L. Hench*
Affiliation:
Ceramics Division, Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611
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Extract

Various methods have been developed for producing crystals, powders, coatings and monoliths from gels [1]. The scientific basis for understanding compositional effects, gelation, aging, drying and densification is also advancing rapidly [2]. However, there is as yet relatively little information on the durability, weathering, or corrosion resistance of glasses, glass-ceramics, ceramics, or composites made via the gel route. Data is also sparse on the effects of vacuum, thermal exposure, or mechanical stress on the stability of gel-derived solids. Relationships between sol-gel processing variables and environmental stability are especially lacking at the present time. Since many end-use applications of gel derived materials involve exposure to severe environments, it is essential that the durability of these materials be established during their development.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 32: Symposium B – Better Ceramics Through Chemistry I , 1984 , 101
Copyright
Copyright © Materials Research Society 1984

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References

REFERENCES

1. Hench, L.L. and Ulrich, D.R., eds., Ultrastructure Processing of Ceramics, Glasses and Composites, (J. Wiley & Sons, Inc., New York, 1984).Google Scholar
2. Hench, L.L. and Ulrich, D.R., eds., Ultrastructure Processing of Ceramics, Glasses and Composites, (J. Wiley & Sons, Inc., New York, 1984) Chapters 4–14.Google Scholar
3. Clark, D.E. and Hench, L.L., Mat. Res. Soc. Symp. Proc. 15 113–124 (1983).CrossRefGoogle Scholar
4. Clark, D.E., Pantano, C.G. and Hench, L.L. in: Corrosion of Glass, (The Glass Industry, New York, 1979).Google Scholar
5. Prassas, M., Hench, L.L., Phalippou, J., and Zarzycki, J., J. Non-Cryst. Solids 48, 79–95 (1982).Google Scholar
6. Prassas, M., Phalippou, J., Hench, L.L., J. Non-Cryst. Solids, 63, 375–389 (1984).CrossRefGoogle Scholar
7. Ferraro, J.R. and Manghnam, M.H., J. Appl. Phys. 43, 4595 (1972).Google Scholar
8. Sanders, D.M., Person, W.B. and Hench, L.L., Appl. Spectra., 28 [31] 247–255 (1974).Google Scholar
9. Hench, L.L., Prassas, M., and Phalippou, J., J. Mon Cryst. Solids 53, 183–193 (1982).Google Scholar
10. Chao, Y. and Clark, D.E., “Weathering of Binary Alkali Silicate Glasses and Glass-Ceramics, to be published in Glass Technology.Google Scholar
11. Prassas, M. and Hench, L.L., “Physical Chemical Factors in Sol-Gel Processing” in: Ultrastructure Processing of Ceramics, Glasses and Composites, Hench, L.L. and Ulrich, D.R., eds. (J. Wiley & Sons, New York. 1984).Google Scholar
12. Wang, S.H. and Hench, L.L., “Processing Variables of Sol-Gel Derived Soda Silicates”, Proceedings 8th Annual Conf. on Composites and Advanced Ceramic Materials, Am. Ceram. Soc., to be published.Google Scholar
13. Wallace, S. and Hench, L.L., “Organometallic-Derived 20 mol% Li2O-80 mol% (20L) Gel Monoliths”, Proceedings 8th Annual Conf. on Composites and Advanced Ceramic Materials, Am. Ceram. Soc., to be published.Google Scholar
14. Orcel, G. and Hench, L.L., “Effect of the Use of a Drying-Control Chemical Agent (DCCA) on the Crystallization and Thermal Behavior of Soda Silicate and Soda Borosilicate”, Proceedings 8th Annual Conf. on Composites and Advanced Ceramic Materials, Am. Ceram. Soc., to be published.Google Scholar
15. Wallace, S. and Hench, L.L., “The Processina and Characterization of DCCA Modified Gel-Derived Silica”, Proceedings MRS Snring Mtg. Albuquerque, NM, 1984.CrossRefGoogle Scholar
16. Wallace, S. and Hench, L.L., to be published.Google Scholar
17. Hench, L.L., Prassas, M. and Phalippou, J., Ceramic Engineering and Science Proceeding, Am. Ceram. Soc., 3, No. 9–10, 447–483 (1982).Google Scholar
18. Hench, L.L., Wallace, S., Wang, S. and Prassas, M., Ceramic Engineering and Science Proceeding, Am. Ceram. Soc., 4 No. 9–10, 732–739 (1983).Google Scholar
19. Dislich, H. and Hinz, P., J. Non Cryst., 48, pp. 11–16 (1982).Google Scholar
20. Arfsten, N. and Dislich, H. in: Ultrastructure Processing of Ceramics, Glasses and Composites, Hench, L.L. and Ulrich, D.R., eds. (John Wiley &Sons, New York, 1984).Google Scholar
21. Phalippou, J., Woignier, T., and Zarzycki, J., “Behavior of Monolithic Silica Aerogels at Temperatures Above 1000°C,” in Ultrastructure Processing of Ceramics, Glasses and Composites, Hench, L.L. and Ulrich, D.R., eds., (J. Wiley & Sons, New York 1984).Google Scholar
22. Pantano, C.G., Glaser, P.M., and Armhurst, D.M., “Nitridation of Silica Sol-Gel Thin Films,” in Ultrastructure Processing of Ceramics, Glasses and Composites, Hench, L.L. and Ulrich, D.R., eds. (J. Wiley & Sons, New York, 1984).Google Scholar