Abstract
Raman spectra are reported for consolidated nanophase TiO2 particles in their as-compacted state and after annealing at a variety of temperatures up to 1273 K. The Raman-active bands normally observed for the rutile form of TiO2 were present in as-compacted samples having average grain sizes in the range from about 10 to 100 nm. However, significant broadening of these bands was found, which was uncorrelated with initial grain size, but not necessarily with other synthesis-related factors. This broadening decreased upon isochronal annealing at elevated temperatures in air. Based upon these observations, it is concluded that nanophase TiO2 in the as-consolidated state contains significant defect concentrations within the rutile grains and that these intragrain defects and the grain-boundary regions as well have local atomic structures with the rutile symmetry, albeit with some short-range displacements. Some sporadic sample regions containing small amounts (<5%) of the anatase form of TiO2 were also found; these traces of anatase transformed to rutile upon annealing in air at temperatures above 883 K.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
H. Gleiter, in Deformation of Polycrystals: Mechanisms and Microstructures, edited by N. Hansen, A. Horsewell, T. Leffers, and H. Lilholt (Rise National Laboratory, Roskilde, 1981), p. 15.
R. Birringer, U. Herr, and H. Gleiter, Suppl. Trans. Jpn. Inst. Met. 27, 43 (1986).
R. W. Siegel and H. Hahn, in Current Trends in the Physics of Materials, edited by M. Yussouff (World Scientific Publ. Co., Singapore, 1987), p. 403.
R. W. Siegel and J. A. Eastman, in Multicomponent Ultrafine Microstructures, Mater. Res. Soc. Symp. Proc. 132 (1989) (in press).
X. Zhu, R. Birringer, U. Herr, and H. Gleiter, Phys. Rev. B 35, 9085 (1987).
U. Herr, J. Jing, R. Birringer, U. Gonser, and H. Gleiter, Appl. Phys. Lett. 50, 472 (1987).
J. Horváth, R. Birringer, and H. Gleiter, Solid State Commun. 62, 319 (1987).
T. Mütschele and R. Kirchheim, Scripta Metall. 21, 1101 (1987).
R. W. Siegel, H. Hahn, S. Ramasamy, Z. Li, T. Lu, and R. Gronsky, in Proc. Interface Science and Engineering ’87, edited by R. Raj and S. L. Sass, J. Physique, Colloque C5, suppl., 681 (1988); R. W. Siegel, S. Ramasamy, H. Hahn, Z. Li, T. Lu, and R. Gronsky, J. Mater. Res. 3, 1367 (1988).
Z. Li, S. Ramasamy, H. Hahn, and R. W. Siegel, Mater. Lett. 6, 195 (1988).
U. Balachandran and N. G. Eror, J. Solid State Chem. 42, 276 (1982).
V. A. Maroni, J. Phys. Chem. Solids 49, 307 (1988).
W. T. Pawlewicz, G. J. Exarhos, and W. E. Conaway, Appl. Optics 22, 1837 (1983).
G. J. Exarhos, J. Chem. Phys. 81, 5211 (1984); Mater. Res. Soc. Symp. Proc. 48, 461 (1985).
S. P. S. Porto, P. A. Fleury, and T. C. Damen, Phys. Rev. 154, 522 (1967).
Y. Hara and M. Nicol, phys. stat. sol. (b) 94, 317 (1979).
L. A. Bursill, B. G. Hyde, O. Terasaki, and D. Watanabe, Philos. Mag. 20, 347 (1969).
J. S. Anderson and R. J. D. Tilley, J. Solid State Chem. 2, 472 (1970).
J. E. Epperson, R. W. Siegel, J. W. White, T. E. Klippert, A. Narayanasamy, J. A. Eastman, and F. Trouw, in Multicomponent Ultra-fine Microstructures, Mater. Res. Soc. Symp. Proc. 132 (1989) (in press).
L. H. Edelson and A. M. Glaeser, J. Am. Ceram. Soc. 71, 225 (1988).
S. M. Vovk, M. Ya. Tsenter, Ya. S. Bobovich, and L. M. Sharygin, Opt. Spectrosc. 55, 476 (1983).
Ya. S. Bobovich, S. M. Vovk, V. I. Petrov, M. Ya. Tsenter, and L. M. Sharygin, Opt. Spectrosc. 59, 834 (1985).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Melendres, C.A., Narayanasamy, A., Maroni, V.A. et al. Raman spectroscopy of nanophase TiO2. Journal of Materials Research 4, 1246–1250 (1989). https://doi.org/10.1557/JMR.1989.1246
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1557/JMR.1989.1246