Abstract
This paper presents the results of investigations of the structure, phase composition, and spectral-luminescent properties of Er2O3-doped zirconia crystals with different Y2O3 concentrations: 99.7 mol % ZrO2-0.3 mol % Er2O3, 97.2 mol % ZrO2-1.0 mol % Y2O3-1.8 mol % Er2O3, 97.2 mol % ZrO2-2.0 mol % Y2O3-0.8 mol % Er2O3, 97.2 mol % ZrO2-2.5 mol % Y2O3-0.3 mol % Er2O3, 96.3 mol % ZrO2-3.4 mol % Y2O3-0.3 mol % Er2O3, and 86 mol % ZrO2-13.4 mol % Y2O3-0.6 mol % Er2O3. The transmission electron microscopy investigation has revealed the presence of twins in the 99.7 mol % ZrO2-0.3 mol % Er2O3 crystals with a monoclinic structure and in the 97.2 mol % ZrO2-2.5 mol % Y2O3-0.3 mol % Er2O3 and 96.3 mol % ZrO2-3.4 mol % Y2O3-0.3 mol % Er2O3 crystals with a tetragonal structure. No twins have been found in the 86 mol % ZrO2-13.4 mol % Y2O3-0.6 mol % Er2O3 crystals with a cubic structure. The phase composition of these crystals has been investigated using X-ray diffraction. It has been found that the 97.2 mol % ZrO2-1.0 mol % Y2O3-1.8 mol % Er2O3 crystals contain only the transformable tetragonal phase t, whereas the 97.2 mol % ZrO2-2.0 mol % Y2O3-0.8 mol % Er2O3, 97.2 mol % ZrO2-2.5 mol % Y2O3-0.3 mol % Er2O3, and 96.3 mol % ZrO2-3.4 mol % Y2O3-0.3 mol % Er2O3 crystals include two tetragonal phases with different degrees of tetragonality c/a: the transformable phase t and nontransformable phase t′. Specific features of the formation of Er3+ optical centers in zirconia crystals with different concentrations of stabilizing oxides have been revealed using the results of experiments on optical spectroscopy.
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Original Russian Text © P.A. Ryabochkina, M.A. Borik, E.E. Lomonova, A.V. Kulebyakin, F.O. Milovich, V.A. Myzina, N.Yu. Tabachkova, N.V. Sidorova, A.N. Chabushkin, 2015, published in Fizika Tverdogo Tela, 2015, Vol. 57, No. 8, pp. 1549–1557.
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Ryabochkina, P.A., Borik, M.A., Lomonova, E.E. et al. Structure, phase composition, and spectral-luminescent properties of ZrO2-Y2O3-Er2O3 crystals. Phys. Solid State 57, 1579–1587 (2015). https://doi.org/10.1134/S1063783415080260
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DOI: https://doi.org/10.1134/S1063783415080260