TRANSPORT PROPERTIES OF La2(WO4)3-Al2O3 COMPOSITES

N. N. Pestereva; Пестерева Н. Н.; A. F. Guseva; Гусева А. Ф.; N. A. Vasilenko; Василенко Н. А.; I. V. Beketov; Бекетов И. В.; N. V. Selezneva; Селезнева Н. В.

doi:10.31857/S0424857023120095

TRANSPORT PROPERTIES OF La2(WO4)3-Al2O3 COMPOSITES

Authors: Pestereva N.N.¹, Guseva A.F.¹, Vasilenko N.A.¹, Beketov I.V.¹^,2, Selezneva N.V.¹
Affiliations:
1. Ural Federal University the first President of Russia B.N. Yeltsin
2. Institute of Electrophysics, Ural Branch, Russian Academy of Sciences
Issue: Vol 59, No 12 (2023)
Pages: 894-904
Section: Articles
URL: https://medjrf.com/0424-8570/article/view/671902
DOI: https://doi.org/10.31857/S0424857023120095
EDN: https://elibrary.ru/QAZLGW
ID: 671902

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Abstract
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Abstract

Composites (1-φ)La2(WO4)3 – φAl2O3 (φ is the volume fraction of nanodispersed aluminum oxide) were obtained by the solid-phase method, their thermal properties, morphology, electrical conductivity depending on temperature, oxygen pressure in the gas phase, and composition were studied. It was found that the conductivity of composites (1-φ)La2(WO4)3 – φAl2O3 passes through a maximum at φ ~ 0.1 and reaches a value of 7 10-3 S/cm at 1000°C, which is 7 times higher than the conductivity of La2(WO4)3 at given temperature. Using the EMF method and measuring the dependence of electrical conductivity on oxygen pressure in the gas phase, the ionic nature of the conductivity of (1-φ)La2(WO4)3 – φAl2O3 composites was established.

Keywords

oxygen-ionic conductivity, composite solid electrolytes, lanthanum tungstate, heterogeneous doping.

References

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