Hostname: page-component-848d4c4894-jbqgn Total loading time: 0 Render date: 2024-06-22T04:13:59.282Z Has data issue: false hasContentIssue false
  • English
  • Français

Chemical Control of Stress in Sol-Gel Derived Titania Films and Their Pressure Dependent Optical Properties

Published online by Cambridge University Press:  25 February 2011

Wendy S. Frydrych ,
Gregory J. Exarhos ,
Kim F. Ferris  and
Nancy J. Hess
Wendy S. Frydrych
Affiliation:
Pacific Northwest Laboratory, P. 0. Box 999, Richland, WA 99352
Gregory J. Exarhos
Affiliation:
Pacific Northwest Laboratory, P. 0. Box 999, Richland, WA 99352
Kim F. Ferris
Affiliation:
Pacific Northwest Laboratory, P. 0. Box 999, Richland, WA 99352
Nancy J. Hess
Affiliation:
Universi ty of Washington, Department of Geology, Seattle, WA 98195
Get access

Abstract

Optical properties and durability of thin films are influenced by strain which can be evaluated from frequency shifts of the lattice phonon lines in measured Raman spectra. The response of titania samples to applied pressure is reported in this work. Anatase and rutile samples of thin films (sol-gel and sputter deposited) and bulk materials have been subjected to hydrostatic pressures approaching 100 kbar in a diamond anvil cell. Results indicate that the rutile samples exhibit similar responses to applied pressure. Anatase sol-gel films exhibit a pressure-dependent response that suggests that the sol-gel film is more compressible than the bulk material, and a pressure-induced phase transformation observed for the bulk material is inhibited in the anatase sol-gel film. The anomalous pressure response of the anatase sol-gel film may result from the film microstructure which has been shown by transmission electron microscopy to consist of spheres of crystalline TiO2 surrounded by microscopic voids.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 121: Symposium H – Better Ceramics Through Chemistry III , 1988 , 343
Copyright
Copyright © Materials Research Society 1988

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Pulker, H. K., Coatings on Glass (Elsevier Science Publishers, New York, 1984), p. 342.Google Scholar
2. Ferris, K. F., Exarhos, G. J., and Nguyen, C. in Laser Induced Damage in Optical Materials; 1986, NBS Spec. Publ., 1986.Google Scholar
3. Frydrych, W. S., Ferris, K. F., Exarhos, G. J., in Atomic and Molecular Processing of Electronic and Ceramic Materials, edited by Aksay, I. A., McVay, G. L., and Stoebe, T. G. (Mater. Res. Soc, Pittsburgh, 1988), pp. 147–152.Google Scholar
4. Ohsaka, T., Yamaoka, S., and Shimomura, O., Solid State Communications 30, 345 (1979).Google Scholar
5. Mammone, J. F., Sharma, S. K., Nicol, M., Solid State Communications 34, 779 (1980).CrossRefGoogle Scholar
6. Hemley, R. J., Beli, P. M., Mao, H. K., Science 237 (4815), 605–612 (1988).CrossRefGoogle Scholar
7. Merrill, L. and Bassett, W., Rev. Sci. Instrumen. 45, 290–294 (1974).CrossRefGoogle Scholar
8. Sherman, W. F., Bull. Soc. Chimique 9–10, 1–347 (1982).Google Scholar
9. Ziman, J. M., Principles of the Theory of Solids (Cambridge University Press, Cambridge, 1964), p. 64.Google Scholar