Synthesis, region of existence, structural characteristics, and conductivity of BI(CR, FE)VOX solid solutions

Величко, Э. В.; Mikhailovskaya, Z. A.; Морозова, М. В.; Buyanova, E. S.; Emel’yanova, Yu. V.; Петрова, С. А.; Zhukovskii, V. M.

doi:10.1134/s1023193511050181

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…This high ionic conductivity in the intermediate temperature range compared to other fluorite and perovskite-type electrolytes make BIMEVOXes as potential electrolytes viable for low temperature operation. Furthermore, in order to obtain improved ionic conducting properties, BIMEVOX group has also been explored as a different system, i.e., BIMEME*VOX [13][14][15][16][17] by double substitution at both Bi/V and/or only V-sites.…”

Section: Introductionmentioning

confidence: 99%

Role of Al and Ti doping in modulating electrical properties of BIVOX system

et al. 2019

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The doubly-doped bismuth vanadate with Al and Ti having formula unit, Bi 2 V 1-x Al x/2 Ti x/2 O 5.5-δ (0.10 ≤ x ≤ 0.25) was synthesized. The specimens were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), differential scanning calorimetric (DSC), UV-Vis, and electrochemical impedance spectroscopy (EIS) for their structural, thermal, optical, and electrical studies. Influence of both dopant cations (Al and Ti) was observed in the gradual stabilization of the tetragonal phase of Bi 2 VO 5.5-δ with dopant amount. A non-uniform grain growth phenomenon was observed up to x = 0.175, with dopant addition. UV-Vis study revealed the comparatively higher order of oxide ion vacancies for the composition x = 0.175. Impedance spectroscopy measurements indicate a significant decrease of both the grain (R g ) and grain boundary resistances (R gb ) with the rise in temperature and the overall resistance is found to be dominated by the grain interior contribution. Enhancement of ionic conductivity was found in all the compositions in the intermediate temperature range as compared to the parent compound, and the single Al-doped system and the highest value were obtained for x = 0.175. vanadate, Bi 2 VO 5.5-δ (where δ denotes the oxygen-ion vacancy) surfaced in the late eighties is of immense importance because of its visibly good ionic conductivity values at relatively low temperature viz. 0.2 S·cm -1 at ~600 ℃ [6]. However, the problem with this compound is of multiple phase transitions (i.e., α↔β and β↔γ between 420 and 450 ℃ and between 540 and 560 ℃ , respectively) and the highest conductivity is found in tetragonal polymorph known as γ-polymorph or phase [6,7]. Therefore, stabilization of this phase at room temperature is essential. The 490

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Section: Introductionmentioning

confidence: 99%

Role of Al and Ti doping in modulating electrical properties of BIVOX system

et al. 2019

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“…Thus, we have been interested in the compounds with the formula Bi4V2-xCux/2Alx/2O11-5x/4. Otherwise, continuing to increase the amount of doping was attempted with other dopants all over the range of occurrence of Bi4V2-xMx/2M'x/2O11-δ solid solutions [16, [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

A study on structural properties, conductivity and FT-IR spectroscopy of Cu–Al doubly substituted Bi4V2O11

Essalim¹,

Ammar²,

Zamama³

et al. 2020

Journal of Solid State Chemistry

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The double-substituted solid solutions Bi4V2-xCux/2Alx/2O11-5x/4, with identical quantitative compositions of Cu 2+ and Al 3+ 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.

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Effect of dopants ionic radii on dielectric properties of Bi4V2−x ME x O11−δ (where x = 0.0 and 0.15; ME = Mg, Ca, Sr and Ba)

Gupta

Singh

2015

Appl. Phys. A

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Synthesis, region of existence, structural characteristics, and conductivity of BI(CR, FE)VOX solid solutions

Cited by 6 publications

References 12 publications

Role of Al and Ti doping in modulating electrical properties of BIVOX system

Role of Al and Ti doping in modulating electrical properties of BIVOX system

A study on structural properties, conductivity and FT-IR spectroscopy of Cu–Al doubly substituted Bi4V2O11

Effect of dopants ionic radii on dielectric properties of Bi4V2−x ME x O11−δ (where x = 0.0 and 0.15; ME = Mg, Ca, Sr and Ba)

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