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Study of nanophase TiO/sub 2/ grain boundaries by Raman spectroscopy [electronic resource].

Published
Argonne, Ill. : Argonne National Laboratory, 1989.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: 6 : digital, PDF file
Additional Creators
Argonne National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Raman spectra have been recorded for as-consolidated nanophase TiO/sub 2/ samples with differing grain sizes and on samples annealed in air at a variety of temperatures up to 1273 K. The nanophase samples with the smallest grain size, about 12 nm average diameter, could have 15-30% of their atoms in grain boundaries; nevertheless, the strong Raman-active lines representative of the rutile structure were found to dominate all of the observed spectra, independent of grain size and annealing treatment. These lines were quite broad in the as-consolidated nanophase samples, equally in 12 nm and 100 nm grain-size compacts, but sharpened considerably upon annealing at elevated temperatures. The Raman data give no indication of grain-boundary structures in nanophase TiO/sub 2/ that are significantly different from those in conventional polycrystals. However, defect structures within the grains, which anneal out at elevated temperatures, are evidenced by changes in the Raman spectra. 15 refs., 2 figs.
Report Numbers
E 1.99:conf-890426-12
conf-890426-12
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Note
Published through SciTech Connect.
01/01/1989.
"conf-890426-12"
"DE89012416"
Spring meeting of the Materials Research Society, San Diego, CA, USA, 24 Apr 1989.
Maroni, V.A.; Siegel, R.W.; Melendres, C.A.; Narayanasamy, A.
Funding Information
W-31109-ENG-38
View MARC record | catkey: 14396574