Informace o publikaci
Multigram preparation of tungsten microfibers via needle-less electrospinning of phosphotungstic acid
| Autoři | |
|---|---|
| Rok publikování | 2023 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | International Journal of Refractory Metals and Hard Materials |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | https://doi.org/10.1016/j.ijrmhm.2023.106121 |
| Doi | http://dx.doi.org/10.1016/j.ijrmhm.2023.106121 |
| Klíčová slova | Electrospinning; Tungsten; Metal; Phosphotungstic acid; Tungstophosphoric acid; Polyvinyl alcohol; Microfibers |
| Popis | Metallic tungsten microfibers were prepared in a multigram yield by electrospinning from the aqueous phosphotungstic acid/polyvinyl alcohol (PVA) solution in three steps. Green composite microfibers of H3PW12O40 /PVA were easily electrospun from precursor solutions on a Nanospider instrument with a cylindrical rotating electrode. Subsequent oxidation of the organic PVA matrix and decomposition of phosphotungstic acid in the air at 600°C provided ceramic WO3/P2O5 fibers. Finally, prepared oxide fibers were reduced in a forming gas atmosphere at temperatures up to 1000°C. During the reduction, all phosphorus was removed, and pure metallic tungsten microfibers were produced. |
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