Photoluminescence and Raman Spectroscopy Studies of Low-Temperature γ-Al2O3 Phases Synthesized from Different Precursors Full article
| Journal |
Optical Materials
ISSN: 0925-3467 |
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| Output data | Year: 2016, Volume: 53, Pages: 87-93 Pages count : 7 DOI: 10.1016/j.optmat.2016.01.029 | ||||
| Tags | Alumina, Local structure, Photoluminescence, Raman spectroscopy | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 16-38-00353 |
| 2 | Russian Foundation for Basic Research | 14-03-31704 |
Abstract:
Spectroscopic features of the local structure of high purity (with the content of impurities <10−3 wt.%) spinel-like γ- and γ∗-Al2O3 phases differing in the unit cell parameters were studied. Samples of these phases were synthesized from crystalline boehmite and nanodispersed pseudoboehmite, respectively. For each of the phases, photoluminescence of transition metal ions and oxygen vacancies – F- and F2-centers – was detected, and Raman scattering spectra were recorded. The photoluminescence study of γ∗-Al2O3 revealed octahedrally coordinated ions Mn4+. Values of the crystal field strength and Racah parameters for Mn4+ ions in γ∗-Al2O3 were determined. Manifestation of PL of Mn4+ ions in γ∗-Al2O3 and its absence in γ-Al2O3 can serve as the indicator for distinguishing between these phases. It was found that γ- and γ∗-Al2O3 samples have individual Raman spectra. The revealed spectroscopic features in the local structure of γ- and γ∗-Al2O3 phases confirm the differences between these spinel-like structures.
Cite:
Baronskiy M.
, Rastorguev A.
, Zhuzhgov A.
, Kostyukov A.
, Krivoruchko O.
, Snytnikov V.
Photoluminescence and Raman Spectroscopy Studies of Low-Temperature γ-Al2O3 Phases Synthesized from Different Precursors
Optical Materials. 2016. V.53. P.87-93. DOI: 10.1016/j.optmat.2016.01.029 WOS Scopus РИНЦ AN OpenAlex
Photoluminescence and Raman Spectroscopy Studies of Low-Temperature γ-Al2O3 Phases Synthesized from Different Precursors
Optical Materials. 2016. V.53. P.87-93. DOI: 10.1016/j.optmat.2016.01.029 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Nov 6, 2015 |
| Accepted: | Jan 14, 2016 |
| Published online: | Jan 21, 2016 |
| Published print: | Mar 1, 2016 |
Identifiers:
| Web of science: | WOS:000371100200016 |
| Scopus: | 2-s2.0-84962177673 |
| Elibrary: | 27145730 |
| Chemical Abstracts: | 2016:119856 |
| OpenAlex: | W2278866100 |