Investigation of the stability of microtube membranes based on Ba0.5Sr0.5Co0.8 – xFe0.2MoxO3 – δ oxides

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Abstract

The present article is devoted to the study of the stability of microtubular membranes based on Ba0.5Sr0.5Co0.8 – xFe0.2MoxO3 – δ oxides obtained by the phase inversion method. The work shows that MT membranes of the composition BSCFMx exhibit long-term stability and resistance to thermal cycling in an air/helium gradient. The maximum oxygen fluxes were achieved using an MT membrane of composition Ba0.5Sr0.5Co0.75Fe0.2Mo0.05O3 – δ (JO2 =7.6 ml*cm-2min-1 at Т=850 oС and pO2.1 = 0.21 atm). In this work, a detailed equilibrium phase diagram for the BSCFM5 oxide has been obtained. The absence of unwanted phase transitions has been demonstrated.

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About the authors

E. V. Shubnikova

Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of Russian Academy of Sciences

Author for correspondence.
Email: artimonovalena@yandex.ru
Russian Federation, 630128, Novosibirsk

O. A. Bragina

Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of Russian Academy of Sciences

Email: artimonovalena@yandex.ru
Russian Federation, 630128, Novosibirsk

A. P. Nemudry

Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of Russian Academy of Sciences

Email: artimonovalena@yandex.ru
Russian Federation, 630128, Novosibirsk

References

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2. Fig. 1. a, b, c – SEM images of the cross section of the BSCFM5 MT membrane fabricated using the phase inversion method; d – SEM image of the BSCFM5 MT membrane after testing.

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3. Fig. 2. X-ray diffraction patterns of MT membranes of composition BSCFMx (x = 0; 2, 5, 10%) before (1) and after (2) tests, the double perovskite phase (Ba/Sr)CoMoO6 is designated *.

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