Abstract
The optical and luminescence characteristics of sapphire crystals grown in nitrogen-containing reducing media based on CO have been investigated. It is shown that the nitrogen dissolution in the oxygen sublattice of sapphire under reducing conditions is accompanied by the formation of F + centers and aggregate F 2 centers (defects that significantly influence the optical absorption and X-ray-, photo-, and thermoluminescence in sapphire). It is established that the formation of Al2O3:N occurs at fairly low nitrogen concentrations in the growth medium (10–20 vol % when a crystal is grown at P ∼ 0.2 Torr and 1 vol % when growth is carried out at P = 800–950 Torr).
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Kaltaev, K.So., Sidelnikova, N.S., Nizgankovsky, S.V. et al. Influence of nitrogen-containing reducing media on the optical and luminescence characteristics of sapphire. Crystallogr. Rep. 57, 912–919 (2012). https://doi.org/10.1134/S1063774512070097
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DOI: https://doi.org/10.1134/S1063774512070097