A study on structural properties, conductivity and FT-IR spectroscopy of Cu–Al doubly substituted Bi4V2O11
ZAMAMA, Mohamed
Laboratoire de physico chimie des matériaux et environnement-FSS de Marrakech [LPCME]
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Laboratoire de physico chimie des matériaux et environnement-FSS de Marrakech [LPCME]
ZAMAMA, Mohamed
Laboratoire de physico chimie des matériaux et environnement-FSS de Marrakech [LPCME]
< Réduire
Laboratoire de physico chimie des matériaux et environnement-FSS de Marrakech [LPCME]
Langue
en
Article de revue
Ce document a été publié dans
Journal of Solid State Chemistry. 2020-08, vol. 288, p. 121405 (8 p.)
Elsevier
Résumé en anglais
The double-substituted solid solutions Bi4V2-xCux/2Alx/2O11-5x/4, with identical quantitative compositions of Cu2+ and Al3+ ions, can occur for a substitution rate 0.1 ≤ x ≤ 0.6. The compound with x = 0.1 is found ...Lire la suite >
The double-substituted solid solutions Bi4V2-xCux/2Alx/2O11-5x/4, with identical quantitative compositions of Cu2+ and Al3+ ions, can occur for a substitution rate 0.1 ≤ x ≤ 0.6. The compound with x = 0.1 is found to be a monoclinic α-form of Bi4V2O11, whereas compounds with 0.2 ≤ x ≤ 0.6 are found to be tetragonal γ and γ’ polymorphs. We used electrochemical impedance spectroscopy to measure the electrical conductivity of doped samples in the temperature range of 250–700 °C. The slope changes observed in the Arrhenius plots might be related to the microstructural transitions occurring in these compounds. The sample with x = 0.2 shows the highest ionic conductivity values.< Réduire
Mots clés en anglais
Bismuth vanadium oxide
BIMEVOX materials
Ionic conductors
Origine
Importé de halUnités de recherche