MHAIRA, Wafaa; AGNAOU, Abdelmajid; ESSALIM, Rachida; TURINO, Andrea; MAUVY, Fabrice; ALGA, Maati; ZAMAMA, Mohamed; AMMAR, Abdelaziz

doi:10.1016/j.jssc.2023.123878

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MHAIRA, Wafaa
Laboratoire des Sciences des Matériaux et Optimisation des Procédés [SCIMATOP]

AGNAOU, Abdelmajid
Laboratoire des Sciences des Matériaux et Optimisation des Procédés [SCIMATOP]

ESSALIM, Rachida
Laboratoire des Sciences des Matériaux et Optimisation des Procédés [SCIMATOP]

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Journal of Solid State Chemistry. 2023, vol. 320, p. 123878 (7 p.)

Elsevier

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BiMeVOx compounds Bi4V2-xCux/2Nbx/2O11-3x/4 doubly substituted solid solution, with identical compositions of Cu2+ and Nb5+ ions, show an area of existence from x = 0 to 0.5. X-ray diffraction measurements and thermal analysis have shown that, depending on the composition, the three main Bi4V2O11 polymorphs α, β and (γ/γ′) are observed at room temperature. The evolution of the electrical conductivity with the rate of substitution has been investigated by electrochemical impedance spectroscopy (EIS) in the temperature range 120–720 °C. The highest values of conductivity are observed for samples with x = 0.2. Scanning electron microscopy (SEM) shows an important grain growth and the presence of micro-cracks in the ceramics with x = 0.5 composition.< Leer menos

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Aurivillius phases

Bi4V2O11

BIMEVOX materials

Ionic conductivity

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Effect of simultaneous Cu and Nb doping Bi4V2O11 on structural and electrical properties of Bi4V2−xCux/2Nbx/2O11−3x/4

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