Abstract
Aluminum oxide nanopowders are prepared by the gas phase method and characterized according to the particle sizes and the phase composition. Samples of the nanostructured ceramic material are produced by pressing and annealing in air. The photoluminescence and cathodoluminescence spectra of the Al2O3 nanostructured ceramic material and α-Al2O3 anion-defect single crystals are investigated under comparable conditions. The luminescence bands of centers formed by oxygen vacancies are revealed in the spectra of two types of samples. The nanostructured ceramic material is characterized by the appearance of a new luminescence band at 3.4 eV and a decrease in the luminescence decay time. The inference is made that the characteristic features of the luminescence of the nanostructured ceramic material can be associated with the presence of non-equilibrium phases and the specific features of relaxation processes.
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Original Russian Text © V.S. Kortov, A.E. Ermakov, A.F. Zatsepin, M.A. Uĭmin, S.V. Nikiforov, A.A. Mysik, V.S. Gaviko, 2008, published in Fizika Tverdogo Tela, 2008, Vol. 50, No. 5, pp. 916–920.
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Kortov, V.S., Ermakov, A.E., Zatsepin, A.F. et al. Specific features of luminescence properties of nanostructured aluminum oxide. Phys. Solid State 50, 957–961 (2008). https://doi.org/10.1134/S1063783408050259
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DOI: https://doi.org/10.1134/S1063783408050259