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http://elar.urfu.ru/handle/10995/90159
Название: | Water uptake and transport properties of La1-xCaxScO3-α proton-conducting oxides |
Авторы: | Lesnichyova, A. Stroeva, A. Belyakov, S. Farlenkov, A. Shevyrev, N. Plekhanov, M. Khromushin, I. Aksenova, T. Ananyev, M. Kuzmin, A. |
Дата публикации: | 2019 |
Издатель: | MDPI AG |
Библиографическое описание: | Water uptake and transport properties of La1-xCaxScO3-α proton-conducting oxides / A. Lesnichyova, A. Stroeva, S. Belyakov, A. Farlenkov, et al. . — DOI 10.3390/ma12142219 // Materials. — 2019. — Vol. 14. — Iss. 12. — 2219. |
Аннотация: | In this study, oxide materials La1-xCaxScO3-α (x = 0.03, 0.05 and 0.10) were synthesized by the citric-nitrate combustion method. Single-phase solid solutions were obtained in the case of calcium content x=0.03 and 0.05,whereas a calcium-enriched impurity phasewas found at x=0.10. Water uptake and release were studied by means of thermogravimetric analysis, thermodesorption spectroscopy and dilatometry. It was shown that lower calcium content in the main phase leads to a decrease in the water uptake. Conductivity wasmeasured by four-probe direct current (DC) and two-probe ascension current (AC)methods at different temperatures, pO2 and pH2O. The effects of phase composition,microstructure and defect structure on electrical conductivity, as well as correlation between conductivity and water uptake experiments, were discussed. The contribution of ionic conductivity of La1-xCaxScO3-α rises with decreasing temperature and increasing humidity. The domination of proton conductivity at temperatures below 500 °C under oxidizing and reducing atmospheres is exhibited. Water uptake and release as well as transport properties of La1-xCaxScO3-α are compared with the properties of similar proton electrolytes, La1-xSrxScO3-α, and the possible reasons for their differences were discussed. © 2019 by the authors. |
Ключевые слова: | DEFECT STRUCTURE LASCO3 PROTON CONDUCTIVITY AND PROTON MOBILITY WATER UPTAKE CALCIUM DEFECT STRUCTURES DEFECTS PROBES PROTON CONDUCTIVITY THERMOGRAVIMETRIC ANALYSIS TRANSPORT PROPERTIES ELECTRICAL CONDUCTIVITY LASCO3 PROTON ELECTROLYTES PROTON MOBILITY PROTON-CONDUCTING OXIDES REDUCING ATMOSPHERE THERMODESORPTION SPECTROSCOPY WATER UPTAKE ATMOSPHERIC TEMPERATURE |
URI: | http://elar.urfu.ru/handle/10995/90159 |
Условия доступа: | info:eu-repo/semantics/openAccess cc-by |
Идентификатор SCOPUS: | 85070462417 |
Идентификатор WOS: | 000480454300007 |
Идентификатор PURE: | 10473183 |
ISSN: | 1996-1944 |
DOI: | 10.3390/ma12142219 |
Сведения о поддержке: | Russian Science Foundation, RSF: 16-13-00053 Government Council on Grants, Russian Federation Ministry of Education and Science of the Republic of Kazakhstan Funding: The research was partially supported by the Russian Science Foundation (Grant №16-13-00053) and the Ministry of Education and Science of the Republic of Kazakhstan (Project No. AP05130148). The education activity of Ph.D. and students involved into this work is supported by Act 211 of Government of the Russian Federation, agreement No. 02.A03.21.0006. |
Карточка проекта РНФ: | 16-13-00053 |
Располагается в коллекциях: | Научные публикации ученых УрФУ, проиндексированные в SCOPUS и WoS CC |
Файлы этого ресурса:
Файл | Описание | Размер | Формат | |
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10.3390-ma12142219.pdf | 3,27 MB | Adobe PDF | Просмотреть/Открыть |
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