| 摘要 |
A method for making vanadium dioxide (V2 or V2O4) powders from vanadyl sulfate without using SO2 gas, comprises evaporative decomposition of a vanadyl sulfate hydrate spray, entrained in a nitrogen atmosphere at O2 partial pressures that would normally predict V2O5 V2O3. The yield of VO2 (also identified as V2O4) is substantially improved, and occurs at lower temperatures, by the addition of hydrogen gas into the atmosphere. Surprisingly, there is no production of V2O3. Minor amounts of a suitable dopant salt dissolved in the spray provide improved low transition temperature powders.
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