In situ X-Ray Diffraction Studies of Pr2-xNiO4+delta Crystal Structure Relaxation Caused by Oxygen Loss Научная публикация
| Конференция |
The 19th International Conference on Solid State Ionics (SSI-19) 02-07 июн. 2013 , Kyoto |
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| Журнал |
Solid State Ionics
ISSN: 0167-2738 |
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| Вых. Данные | Год: 2014, Том: 262, Страницы: 918-922 Страниц : 5 DOI: 10.1016/j.ssi.2014.02.001 | ||||||||
| Ключевые слова | In situ XRD, Mass, conductivity and structure relaxations, Oxygen diffusion and surface chemical exchange coefficients, Oxygen loss, Praseodymium nickelates, Synchrotron radiation | ||||||||
| Авторы |
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| Организации |
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Информация о финансировании (1)
| 1 | Министерство образования и науки Российской Федерации |
Реферат:
Fine powders of Pr2 − xNiO4 + δ (PNO) oxides (x = 0 ÷ 0.3) synthesized by Pechini route were uniaxially pressed into pellets and sintered at 1300 °C under air. Chemical diffusion coefficients (Dchem.) and surface exchange constants (kchem.) were estimated by analysis of the weight and conductivity relaxations after step-wise change of pO2. In situ XRD studies were carried out in VEPP-3 facilities of the Siberian Center of Synchrotron Radiation using unique high-temperature camera and procedures.
Analysis of dynamics of the cell volume expansion caused by oxygen loss with due regard for penetration depth of X-rays into the pellet allowed to estimate Dchem and kchem found to be close to those obtained by traditional methods. Isolated Pr vacancies appear to be the most important for fast oxygen diffusion and high surface reactivity providing the highest values of kchem and Dchem for Pr1.9NiO4 + δ composition.
Библиографическая ссылка:
Sadykov V.
, Okhlupin Y.
, Yeremeev N.
, Vinokurov Z.
, Shmakov A.
, Belyaev V.
, Uvarov N.
, Mertens J.
In situ X-Ray Diffraction Studies of Pr2-xNiO4+delta Crystal Structure Relaxation Caused by Oxygen Loss
Solid State Ionics. 2014. V.262. P.918-922. DOI: 10.1016/j.ssi.2014.02.001 WOS Scopus РИНЦ OpenAlex CAPlusCA
In situ X-Ray Diffraction Studies of Pr2-xNiO4+delta Crystal Structure Relaxation Caused by Oxygen Loss
Solid State Ionics. 2014. V.262. P.918-922. DOI: 10.1016/j.ssi.2014.02.001 WOS Scopus РИНЦ OpenAlex CAPlusCA
Даты:
| Поступила в редакцию: | 17 мая 2013 г. |
| Принята к публикации: | 1 февр. 2014 г. |
| Опубликована online: | 18 февр. 2014 г. |
| Опубликована в печати: | 1 сент. 2014 г. |
Идентификаторы БД:
| ≡ Web of science: | WOS:000338810500201 |
| ≡ Scopus: | 2-s2.0-84903313216 |
| ≡ РИНЦ: | 24061947 |
| ≡ OpenAlex: | W2148849016 |
| ≡ Chemical Abstracts: | 2014:284215 |
| ≡ Chemical Abstracts (print): | 162:595795 |