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

被引：11

作者：

Mhaira, W. ^{[1
]}

Agnaou, A. ^{[1
]}

Essalim, R. ^{[1
]}

Turino, A. ^{[2
,3
]}

Mauvy, F. ^{[2
]}

Alga, M. ^{[1
]}

Zamama, M. ^{[1
]}

Ammar, A. ^{[1
]}

机构：

[1] Univ Cady Ayyad, Fac Sci Semlalia, Lab Sci Mat & Optimisatan Proc SCIMATOP, Ave Prince Moulay Abdellah, BP 2390, Marrakech, Morocco

[2] Univ Bordeaux, CNRS, Bordeaux INP, ICMCB,UMR 5026, F-33600 Pessac, France

[3] Univ Padua, Dept Chem Sci, Via Marzolo 1, I-35131 Padua, Italy

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2023年 / 320卷

关键词：

Aurivillius phases; Bi4V2O11; BIMEVOX materials; Ionic conductivity; CRYSTAL-STRUCTURE DETERMINATION; IONIC-CONDUCTIVITY; GAMMA-BI4V2O11; POLYMORPHS; PHASE; ALPHA-BI4V2O11; BETA-BI4V2O11; DISTANCES; CERAMICS; FAMILY; OXIDE;

D O I：

10.1016/j.jssc.2023.123878

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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 alpha, beta and (gamma/gamma') 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 degrees 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.

引用

页数：7

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