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Structural and Transport Properties of Doped LAMOX — Electrolytes for IT SOFC Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Conference 20th International Conference on Solid State Ionics (SSI-20)
14-19 Jun 2015 , Keystone
Journal Solid State Ionics
ISSN: 0167-2738
Output data Year: 2016, Volume: 288, Pages: 103-109 Pages count : 7 DOI: 10.1016/j.ssi.2016.01.026
Tags Ionic conductivity, LAMOX, Oxygen diffusion, Synthesis
Authors Pavlova S. 1 , Bespalko Y. 1 , Sadykov V. 1,2 , Eremeev N. 1 , Krieger T. 1,2 , Sadovskaya E. 1,2 , Ishchenko A. 1,2 , Bobin A. 1,2 , Uvarov N. 3 , Smirnova A. 4
Affiliations
1 Boreskov Institute of Catalysis, Prosp. Acad. Lavrentieva, 5, 630090, Novosibirsk, Russian Federation
2 Novosibirsk State University, Novosibirsk, Russian Federation
3 Institute of Solid State Chemistry SB RAS, Novosibirsk, Russian Federation
4 South Dakota School of Mines and Technology, Rapid City, SD 57701, USA

Funding (2)

1 Russian Science Foundation 16-13-00112
2 American Chemical Society 12658

Abstract: Doped La2 − xRxMo2 − yWyO9 (R = Bi, Gd, Pr, Sm, Nd; x = 0–0.5, y = 0.5–1) were synthesized via polymerized precursors method or high power mechanical milling (MM). The study of doped LAMOX genesis and structural properties using thermal analysis, XRD, TEM has revealed that for all cations substituting La-position, the pure cubic β-phase is formed from polymerized precursors after calcination at 700 °C. W-doped LAMOX have been obtained via low temperature calcination of MM products. Due to a high dispersion of powders, high density pellets of doped LAMOX ceramics have been already obtained after sintering at 950 °C. Their electrical conductivity measured by impedance spectroscopy varies in the range of 2.3–5.6 · 10− 3 S/cm at 630 °C depending on the doping cation nature. The self-diffusion coefficient (DO) values calculated from corresponding conductivities is in the range of 6–14 · 10− 9 cm2/s at 630 °C agreeing well with those from the data of C18O2 SSITKA for oxygen isotope exchange with powders of LAMOX.
Cite: Pavlova S. , Bespalko Y. , Sadykov V. , Eremeev N. , Krieger T. , Sadovskaya E. , Ishchenko A. , Bobin A. , Uvarov N. , Smirnova A.
Structural and Transport Properties of Doped LAMOX — Electrolytes for IT SOFC
Solid State Ionics. 2016. V.288. P.103-109. DOI: 10.1016/j.ssi.2016.01.026 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Jul 17, 2015
Accepted: Jan 6, 2016
Published online: Feb 2, 2016
Published print: May 1, 2016
Identifiers:
publication_identifier.wos_identifier_type WOS:000376710900020
publication_identifier.scopus_identifier_type 2-s2.0-84956654804
publication_identifier.rinz_identifier_type 35473521
publication_identifier.accession_number_identifier_type 2016:110614
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