Study of defect formation mechanisms in Li2ZrO3/MgLi2ZrO4 ceramics using EPR spectroscopy
The article presents the results of experimental studies of the effect of the stabilizing MgO dopant using the electron spin resonance (ESP) method on enhancement of the stability of Li2ZrO3 ceramics to defect formation processes and accumulation of radiolysis products in the near-surface layer in t...
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Elsevier
2025-02-01
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| Series: | Optical Materials: X |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590147824001086 |
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| author | Dmitriy I. Shlimas Ainagul A. Khametova Artem L. Kozlovskiy Maxim V. Zdorovets |
| author_facet | Dmitriy I. Shlimas Ainagul A. Khametova Artem L. Kozlovskiy Maxim V. Zdorovets |
| author_sort | Dmitriy I. Shlimas |
| collection | DOAJ |
| description | The article presents the results of experimental studies of the effect of the stabilizing MgO dopant using the electron spin resonance (ESP) method on enhancement of the stability of Li2ZrO3 ceramics to defect formation processes and accumulation of radiolysis products in the near-surface layer in the case of high-dose irradiation with protons simulating the hydrogenation effects characteristic of processes associated with tritium production. During the conducted studies, it was established that the addition of the stabilizing MgO dopant results in formation of inclusions in the form of the tetragonal MgLi2ZrO4 phase, which leads to an increase in the resistance of the near-surface layers to destructive damage due to the accumulation of structural damage (oxygen vacancies and point defects), as well as products of the physicochemical processes of radiolysis, characteristic of high irradiation fluence values. It was found that in the case of unmodified Li2ZrO3 ceramics, the formation of HC2 – centers is observed at a fluence of 1016 proton/cm2, while for two-phase ceramics, the formation of HC2 – centers is observed at higher fluences, while the intensity of the bands is significantly less than in the case of single-phase unmodified ceramics. The difference in the nature of changes in the intensities of singlet bands responsible for the presence of vacancy defects in the damaged layer, as well as HC2 – centers for single-phase and two-phase ceramics is a direct confirmation of the inhibition of structural degradation mechanisms in two-phase ceramics. |
| format | Article |
| id | doaj-art-93866432d2d74d43a0e3296723e2e4cd |
| institution | Kabale University |
| issn | 2590-1478 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Optical Materials: X |
| spelling | doaj-art-93866432d2d74d43a0e3296723e2e4cd2025-02-08T05:01:05ZengElsevierOptical Materials: X2590-14782025-02-0125100396Study of defect formation mechanisms in Li2ZrO3/MgLi2ZrO4 ceramics using EPR spectroscopyDmitriy I. Shlimas0Ainagul A. Khametova1Artem L. Kozlovskiy2Maxim V. Zdorovets3Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan; Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana, 010008, KazakhstanLaboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan; Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana, 010008, KazakhstanLaboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan; Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan; Department of Chemical Processes and Industrial Ecology, Satbayev University, Almaty, 050032, KazakhstanLaboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan; Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana, 010008, Kazakhstan; Corresponding author. Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty, 050032, Kazakhstan.The article presents the results of experimental studies of the effect of the stabilizing MgO dopant using the electron spin resonance (ESP) method on enhancement of the stability of Li2ZrO3 ceramics to defect formation processes and accumulation of radiolysis products in the near-surface layer in the case of high-dose irradiation with protons simulating the hydrogenation effects characteristic of processes associated with tritium production. During the conducted studies, it was established that the addition of the stabilizing MgO dopant results in formation of inclusions in the form of the tetragonal MgLi2ZrO4 phase, which leads to an increase in the resistance of the near-surface layers to destructive damage due to the accumulation of structural damage (oxygen vacancies and point defects), as well as products of the physicochemical processes of radiolysis, characteristic of high irradiation fluence values. It was found that in the case of unmodified Li2ZrO3 ceramics, the formation of HC2 – centers is observed at a fluence of 1016 proton/cm2, while for two-phase ceramics, the formation of HC2 – centers is observed at higher fluences, while the intensity of the bands is significantly less than in the case of single-phase unmodified ceramics. The difference in the nature of changes in the intensities of singlet bands responsible for the presence of vacancy defects in the damaged layer, as well as HC2 – centers for single-phase and two-phase ceramics is a direct confirmation of the inhibition of structural degradation mechanisms in two-phase ceramics.http://www.sciencedirect.com/science/article/pii/S2590147824001086Radiation damageElectron spin resonance methodStabilizing dopantLithium-containing ceramics |
| spellingShingle | Dmitriy I. Shlimas Ainagul A. Khametova Artem L. Kozlovskiy Maxim V. Zdorovets Study of defect formation mechanisms in Li2ZrO3/MgLi2ZrO4 ceramics using EPR spectroscopy Optical Materials: X Radiation damage Electron spin resonance method Stabilizing dopant Lithium-containing ceramics |
| title | Study of defect formation mechanisms in Li2ZrO3/MgLi2ZrO4 ceramics using EPR spectroscopy |
| title_full | Study of defect formation mechanisms in Li2ZrO3/MgLi2ZrO4 ceramics using EPR spectroscopy |
| title_fullStr | Study of defect formation mechanisms in Li2ZrO3/MgLi2ZrO4 ceramics using EPR spectroscopy |
| title_full_unstemmed | Study of defect formation mechanisms in Li2ZrO3/MgLi2ZrO4 ceramics using EPR spectroscopy |
| title_short | Study of defect formation mechanisms in Li2ZrO3/MgLi2ZrO4 ceramics using EPR spectroscopy |
| title_sort | study of defect formation mechanisms in li2zro3 mgli2zro4 ceramics using epr spectroscopy |
| topic | Radiation damage Electron spin resonance method Stabilizing dopant Lithium-containing ceramics |
| url | http://www.sciencedirect.com/science/article/pii/S2590147824001086 |
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