Preparation and Some Properties of Lithium Vanadium Bronzes

Lithium vanadium bronzes with composition formula LixV2O5 (0.04 ≤ × ≤ 0.92) have been prepared by solid‐state reaction at 650 °C in argon atmosphere. The obtained products were characterized by X‐ray powder diffraction and IR spectroscopy. The results reveal that four phases are present in the range...

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Bibliographic Details
Published in:Journal of the Chinese Chemical Society (Taipei) 2006-06, Vol.53 (3), p.559-565
Main Authors: El-Sayed, Ahmed Mohamed, Mousa, Sahar Mohamed Ahmed
Format: Article
Language:English
Subjects:
Electrical conductivity
LiV2O5
Magnetic susceptibility
XRD
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Summary:Lithium vanadium bronzes with composition formula LixV2O5 (0.04 ≤ × ≤ 0.92) have been prepared by solid‐state reaction at 650 °C in argon atmosphere. The obtained products were characterized by X‐ray powder diffraction and IR spectroscopy. The results reveal that four phases are present in the range from x = 0.04 to 0.92, namely α, β, β′, and γ phase. The magnetic susceptibility for the investigated bronzes was measured using the conventional Gouy's method. The values of the effective magnetic moments, as calculated from experimental data, indicate the presence of V4+ ions in all bronze samples. The electrical conductivity as a function of temperature and lithium content was measured in the temperature range from room temperature to 483 K. The electrical conductivity of the bronzes is found to be affected by lithium content. The values of the electrical conductivity increase with temperature for the prepared samples and both electronic and ionic conduction are discussed.
ISSN:0009-4536
2192-6549
DOI:10.1002/jccs.200600073