Methods of Isotopic Relaxations for Estimation of Oxygen Diffusion Coefficients in Solid Electrolytes and Materials with Mixed Ionic-Electronic Conductivity Full article
| Journal |
Russian Journal of Electrochemistry
ISSN: 1023-1935 , E-ISSN: 1608-3342 |
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| Output data | Year: 2015, Volume: 51, Number: 5, Pages: 458-467 Pages count : 10 DOI: 10.1134/S1023193515050109 | ||||||
| Tags | composites, doped cerium-zirconium oxides, doped lanthanum silicates, isotopic exchange of oxygen, mixed praseodymium nickelates-cobaltites, self-diffusion | ||||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | The Ministry of Education and Science of the Russian Federation |
Abstract:
Theoretical basis of isotopic oxygen exchange in a gas-solid oxide system are considered. A generalized model is suggested that accounts for diffusion of tracer oxygen atoms and allows within a single approach to perform numeric analysis of isotope experiments implemented in reactors of various types and in different temperature modes. It is shown that when C18O2 is used as an isotopic reagent, the oxygen exchange rate on the metal oxide surface increases manifold (as compared to 18O2), which allows determining more precisely diffusion limitations in case of isotopic exchange of oxygen in the oxide bulk. Estimates of oxygen self-diffusion coefficients are obtained in dispersed systems based on doped cerium-zirconium oxides with a fluorite-type structure, doped lanthanum silicates with an apatite-type structure, and also mixed praseodymium nickelates-cobaltites and their composites with yttrium-doped ceria.
Cite:
Sadykov V.A.
, Sadovskaya E.M.
, Uvarov N.F.
Methods of Isotopic Relaxations for Estimation of Oxygen Diffusion Coefficients in Solid Electrolytes and Materials with Mixed Ionic-Electronic Conductivity
Russian Journal of Electrochemistry. 2015. V.51. N5. P.458-467. DOI: 10.1134/S1023193515050109 WOS Scopus РИНЦ ANCAN OpenAlex
Methods of Isotopic Relaxations for Estimation of Oxygen Diffusion Coefficients in Solid Electrolytes and Materials with Mixed Ionic-Electronic Conductivity
Russian Journal of Electrochemistry. 2015. V.51. N5. P.458-467. DOI: 10.1134/S1023193515050109 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Садыков В.А.
, Садовская Е.М.
, Уваров Н.Ф.
Метод изотопных релаксаций для оценки коэффициентов диффузии кислорода в твердых электролитах и материалах со смешанной ионно-электронной проводимостью
Электрохимия. 2015. Т.51. №5. С.529-539. DOI: 10.7868/S0424857015050114 РИНЦ OpenAlex
Метод изотопных релаксаций для оценки коэффициентов диффузии кислорода в твердых электролитах и материалах со смешанной ионно-электронной проводимостью
Электрохимия. 2015. Т.51. №5. С.529-539. DOI: 10.7868/S0424857015050114 РИНЦ OpenAlex
Dates:
| Submitted: | Jul 31, 2014 |
| Published print: | May 1, 2015 |
| Published online: | May 30, 2015 |
Identifiers:
| Web of science: | WOS:000355411900013 |
| Scopus: | 2-s2.0-84930204878 |
| Elibrary: | 24039689 |
| Chemical Abstracts: | 2015:929283 |
| Chemical Abstracts (print): | 164:431938 |
| OpenAlex: | W1935812609 |