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Kiryakov A, Zatsepin A, Dyachkova T, Tyutyunnik A. Residual strain and effects of lattice compression in thermobaric-synthesized optical nanoceramics MgAl2O4:Mn. Ann Ital Chir 2022. [DOI: 10.1016/j.jeurceramsoc.2022.11.043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Lushchik A, Feldbach E, Kotomin EA, Kudryavtseva I, Kuzovkov VN, Popov AI, Seeman V, Shablonin E. Distinctive features of diffusion-controlled radiation defect recombination in stoichiometric magnesium aluminate spinel single crystals and transparent polycrystalline ceramics. Sci Rep 2020; 10:7810. [PMID: 32385421 PMCID: PMC7210938 DOI: 10.1038/s41598-020-64778-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 04/20/2020] [Indexed: 11/09/2022] Open
Abstract
MgAl2O4 spinel is important optical material for harsh radiation environment and other important applications. The kinetics of thermal annealing of the basic electron (F, F+) and hole (V) centers in stoichiometric MgAl2O4 spinel irradiated by fast neutrons and protons is analyzed in terms of diffusion-controlled bimolecular reactions. Properties of MgAl2O4 single crystals and optical polycrystalline ceramics are compared. It is demonstrated that both transparent ceramics and single crystals, as well as different types of irradiation show qualitatively similar kinetics, but the effective migration energy Ea and pre-exponent D0 are strongly correlated. Such correlation is discussed in terms of the so-called Meyer-Neldel rule known in chemical kinetics of condensed matter. The results for the irradiated spinel are compared with those for sapphire, MgO and other radiation-resistant materials.
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Affiliation(s)
- A Lushchik
- Institute of Physics, University of Tartu, W. Ostwald Str. 1, 50411, Tartu, Estonia
| | - E Feldbach
- Institute of Physics, University of Tartu, W. Ostwald Str. 1, 50411, Tartu, Estonia
| | - E A Kotomin
- Institute of Solid State Physics, University of Latvia, Kengaraga 8, Riga, LV-1063, Latvia
| | - I Kudryavtseva
- Institute of Physics, University of Tartu, W. Ostwald Str. 1, 50411, Tartu, Estonia
| | - V N Kuzovkov
- Institute of Solid State Physics, University of Latvia, Kengaraga 8, Riga, LV-1063, Latvia
| | - A I Popov
- Institute of Solid State Physics, University of Latvia, Kengaraga 8, Riga, LV-1063, Latvia.
| | - V Seeman
- Institute of Physics, University of Tartu, W. Ostwald Str. 1, 50411, Tartu, Estonia
| | - E Shablonin
- Institute of Physics, University of Tartu, W. Ostwald Str. 1, 50411, Tartu, Estonia.,Institute of Solid State Physics, University of Latvia, Kengaraga 8, Riga, LV-1063, Latvia
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