Study of nanophase TiO/sub 2/ grain boundaries by Raman spectroscopy Metadata

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Title

  • Main Title Study of nanophase TiO/sub 2/ grain boundaries by Raman spectroscopy

Creator

  • Author: Melendres, C.A.
    Creator Type: Personal
  • Author: Narayanasamy, A.
    Creator Type: Personal
  • Author: Maroni, V.A.
    Creator Type: Personal
  • Author: Siegel, R.W.
    Creator Type: Personal

Publisher

  • Name: Argonne National Laboratory
    Place of Publication: Illinois

Date

  • Creation: 1989-01-01

Language

  • English

Description

  • Content Description: 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.
  • Physical Description: 6 pages

Subject

  • STI Subject Categories: 400102 -- Chemical & Spectral Procedures
  • Keyword: Chalcogenides
  • Keyword: Spectra
  • Keyword: Titanium Compounds
  • Keyword: Crystal Structure
  • Keyword: Oxides
  • Keyword: Titanium Oxides
  • STI Subject Categories: 37 Inorganic, Organic, Physical And Analytical Chemistry
  • STI Subject Categories: 36 Materials Science
  • Keyword: Crystals
  • Keyword: Polycrystals
  • Keyword: Grain Size
  • Keyword: Annealing
  • Keyword: Transition Element Compounds 360202* -- Ceramics, Cermets, & Refractories-- Structure & Phase Studies
  • Keyword: Raman Spectra
  • Keyword: Microstructure
  • Keyword: Grain Boundaries
  • Keyword: Heat Treatments
  • Keyword: Size
  • Keyword: Oxygen Compounds

Source

  • Conference: Spring meeting of the Materials Research Society, San Diego, CA, USA, 24 Apr 1989

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Other: DE89012416
  • Report No.: CONF-890426-12
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 6000098
  • Archival Resource Key: ark:/67531/metadc1099170

Note

  • Display Note: NTIS, PC A02/MF A01 - OSTI; 1.
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