Preparation of vanadium powders by calcium vapor reduction of V2O3 under vacuum

Wang, Fengkang; Xu, Baoqiang; Wan, Heli; Yang, Jia; Yang, Bin; Jiang, Wenlong

doi:10.1016/j.vacuum.2019.109133

Cited by 9 publications

(1 citation statement)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both MgO and Mg were not detected, indicating that an appropriate removal was made by these procedures and the product V(0) was successfully isolated. Although a possible formation of V 2 H cannot be excluded, V 2 H will be removed during the drying in vacuo. The yield of V(0) after this isolation and purification was 55.6%.…”

Section: Figurementioning

confidence: 99%

A Facile Formation of Vanadium(0) by the Reduction of Vanadium Pentoxide Pelletized with Magnesium Oxide Enabled by Microwave Irradiation

et al. 2020

View full text Add to dashboard Cite

The reduction of V2O5 to vanadium metal(0), that requires severe conditions in conventional reduction methods, was enabled to be proceeded in a short time of 1 h at 1273 K by the reaction with magnesium vapor with the isolation yield of V(0) in 55.6% by using microwave irradiation of 820 W. A pressurized pelletization of powdery V2O5 well‐mixed with MgO powder at a specific mixing ratio followed by calcination in ambient air at 1173 K was crucial for the reaction since a complex oxide of MgV2O4, presumably as a precursor, was formed in calcination of the V2O5/MgO pellet to be reduced to V(0) by the reaction with magnesium. Calcination of V2O5/MgO pellets with different mixing ratios or different temperatures resulted in the formation of different kinds of complex oxide of vanadium and magnesium such as α‐Mg2V2O7, Mg3(VO4)2, triclinic Mg2V2O7, and MgV2O6. While the yield of V(0) was dependent on the kind of the complex oxide, formation of MgV2O4 was essential as the precursor to the formation of V(0).

show abstract

Section: Figurementioning

confidence: 99%