Raman microprobe study of nanophase TiO sub 2 and oxidation-induced spectral changes

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · Journal of Materials Research; (USA)

DOI:https://doi.org/10.1557/JMR.1990.1246· OSTI ID:6549870

Parker, J C; Siegel, R W ^[1]

---

1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (USA)

A Raman microprobe study of as-compacted nanophase TiO{sub 2} was carried out to investigate the spatial inhomogeneity of its anatase and rutile phases. Also, changes in the observed Raman spectra (line shifts and broadening) were investigated as a function of annealing at temperatures up to 600 {degree}C in argon or air. Microscopic phase inhomogeneity is observed and Raman spectral changes are shown to result from inhomogeneous oxygen deficiency in the nanophase TiO{sub 2}. The line positions corresponding to the Raman active {ital E}{sub {ital g}} modes in both anatase and rutile are found to be sensitive to this oxygen deficiency and are potential quantitative indicators of such deviations from stoichiometry.

• OSTI ID: 6549870
• Journal Information: Journal of Materials Research; (USA), Journal Name: Journal of Materials Research; (USA) Vol. 5:6; ISSN JMREE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ANNEALING
CHALCOGENIDES
CHEMICAL REACTIONS
GRANULAR MATERIALS
HEAT TREATMENTS
LINE BROADENING
MATERIALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
RAMAN SPECTRA
SPECTRA
SPECTRAL SHIFT
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS