Multigram preparation of tungsten microfibers via needle-less electrospinning of phosphotungstic acid
| Authors | |
|---|---|
| Year of publication | 2023 |
| Type | Article in Periodical |
| Magazine / Source | International Journal of Refractory Metals and Hard Materials |
| MU Faculty or unit | |
| Citation | |
| Web | https://doi.org/10.1016/j.ijrmhm.2023.106121 |
| Doi | http://dx.doi.org/10.1016/j.ijrmhm.2023.106121 |
| Keywords | Electrospinning; Tungsten; Metal; Phosphotungstic acid; Tungstophosphoric acid; Polyvinyl alcohol; Microfibers |
| Description | 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. |
| Related projects: |