Conductivity of Composites MeWO4–Al2O3 (Me = Ca, Sr)

Conductivity of Composites MeWO4–Al2O3 (Me = Ca, Sr)

Composites (1 – x )MeWO 4 – x Аl 2 O 3 (Me = Ca, Sr) are synthesized by the solid-phase method. Their phase composition and thermodynamic stability are confirmed by the XRD and TG-DSC data, respectively. Their morphology is studied by the SEM-EDA method. The conductivity of composites is studied by...

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Veröffentlicht in:Russian journal of electrochemistry 2023-04, Vol.59 (4), p.284-290
Hauptverfasser: Guseva, A. F., Pestereva, N. N., Kuznetsov, D. K., Boyarshinova, A. A., Gardt, V. A.
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum oxide
Chemistry
Chemistry and Materials Science
Composite materials
Electrochemical impedance spectroscopy
Electrochemistry
Phase composition
Physical Chemistry
Solid phases
Strontium
Tungstates
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Zusammenfassung:Composites (1 – x )MeWO 4 – x Аl 2 O 3 (Me = Ca, Sr) are synthesized by the solid-phase method. Their phase composition and thermodynamic stability are confirmed by the XRD and TG-DSC data, respectively. Their morphology is studied by the SEM-EDA method. The conductivity of composites is studied by the method of electrochemical impedance spectroscopy as a function of the temperature, the gas-phase oxygen pressure, and the content of added disperse Аl 2 O 3 . It is shown that composites (1 – x )MeWO 4 – x Аl 2 O 3 (Me = Ca, Sr) are ionic conductors and their conductivity is 4–12 times higher as compared with the corresponding tungstates.
ISSN:1023-1935
1608-3342
DOI:10.1134/S1023193523040079