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Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
Phase control in vanadium recovery via matrix-introduced interfacial atomic diffusion
Hongrui Yue1, Xuehai Tan1, Hao Zhang1
1Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
Journal of Hazardous Materials
|July 18, 2026
Summary
A novel matrix-introduced interfacial atomic diffusion (MIIAD) strategy enhances vanadium slag processing by selectively stabilizing the CaV2O6 phase. This method improves vanadium extraction efficiency and offers energy-saving potential in metallurgy.
Area of Science:
- Metallurgical Engineering
- Materials Science
- Chemical Engineering
Background:
- Controlling product selectivity in high-temperature solid-solid reactions is difficult, particularly in vanadium slag processing.
- The formation of multiple calcium vanadates complicates efficient vanadium recovery.
Purpose of the Study:
- To introduce and elucidate a matrix-introduced interfacial atomic diffusion (MIIAD) strategy.
- To selectively stabilize the most leachable phase, CaV2O6, for improved vanadium recovery.
Main Methods:
- Utilizing an Fe2O3 matrix between V2O5 and CaO to control interfacial diffusion.
- Employing multiscale characterization and Density Functional Theory (DFT) calculations.
- Developing a pellet architecture with MIIAD interfaces using Fe2O3-rich leaching residue.
Main Results:
- The MIIAD strategy successfully stabilized the CaV2O6 interfacial layer.
- DFT calculations showed lower diffusion barriers in Fe2O3, explaining selective CaV2O6 stabilization.
- MIIAD pellets achieved 74.17% vanadium extraction under insufficient leaching, outperforming conventional methods (53.36%).
Conclusions:
- The MIIAD strategy effectively controls product selectivity in high-temperature reactions.
- This approach offers a practical and energy-saving solution for enhanced vanadium extraction from slag.
