In situ X-Ray Diffraction Studies of Pr2-xNiO4+delta Crystal Structure Relaxation Caused by Oxygen Loss Full article
| Conference |
The 19th International Conference on Solid State Ionics (SSI-19) 02-07 Jun 2013 , Kyoto |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| Journal |
Solid State Ionics
ISSN: 0167-2738 |
||||||||
| Output data | Year: 2014, Volume: 262, Pages: 918-922 Pages count : 5 DOI: 10.1016/j.ssi.2014.02.001 | ||||||||
| Tags | In situ XRD, Mass, conductivity and structure relaxations, Oxygen diffusion and surface chemical exchange coefficients, Oxygen loss, Praseodymium nickelates, Synchrotron radiation | ||||||||
| Authors |
|
||||||||
| Affiliations |
|
Funding (1)
| 1 | The Ministry of Education and Science of the Russian Federation |
Abstract:
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.
Cite:
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 ANCAN
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 ANCAN
Dates:
| Submitted: | May 17, 2013 |
| Accepted: | Feb 1, 2014 |
| Published online: | Feb 18, 2014 |
| Published print: | Sep 1, 2014 |
Identifiers:
| ≡ Web of science: | WOS:000338810500201 |
| ≡ Scopus: | 2-s2.0-84903313216 |
| ≡ Elibrary: | 24061947 |
| ≡ OpenAlex: | W2148849016 |
| ≡ Chemical Abstracts: | 2014:284215 |
| ≡ Chemical Abstracts (print): | 162:595795 |