Статья
2017
Abstract / Full Text

The work is devoted to the study of transport properties at the SrMoO4/MoO3 interface and examination of composite phases based on these compounds. The mass transfer in the (‒)MoO3/SrMoO4/MoO3(+) cell is studied in the spontaneous mode (with no polarization) and electric field-induced mode. In the spontaneous mode, MoO3 is drawn onto the inner surface of SrMoO4 ceramic briquette. Under a polarization, molybdenyl ion {MoO2}2+ is one of the charge carriers, which is evidenced by the Tubandt method. Thus, both spontaneously and under an external polarization, MoO3 is transferred onto the inner surface of SrMoO4 ceramics. It is found that the ionic transfer prevails for SrMoO4: the average transport numbers by the emf method are close to unity, the oxygen activity in the gas phase (in the range 0.21…10–5 atm) has no effect on the conductivity. The composites {SrMoO4xMoO3} (where x = 1, 5, 10, 15, 20 mol %) are fabricated; the presence of two phases is evidenced by the X-ray diffraction analysis. The temperature dependence of the total conductivity is determined. In the range of small MoO3 additions to SrMoO4, the conductivity steeply increases revealing the similarity to the {MeWO4xWO3 (Me–Ca, Sr, Ba)} composites.

Author information
  • Ural Federal University Named after the First President of Russia B.N. Eltsin, ul. Mira 19, Yekaterinburg, 620002, Russia

    E. A. Koteneva, N. N. Pestereva, D. V. Astapova, A. Ya. Neiman & I. E. Animitsa

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