epsilon-Fe2O3 nanoparticles synthesized in atmospheric-pressure microwave torch

0431853 - ÚFM 2015 RIV NL eng J - Journal Article
David, Bohumil - Pizúrová, Naděžda - Synek, P. - Kudrle, V. - Jašek, O. - Schneeweiss, Oldřich
epsilon-Fe2O3 nanoparticles synthesized in atmospheric-pressure microwave torch.
Materials Letters. Roč. 116, FEB (2014), s. 370-373. ISSN 0167-577X. E-ISSN 1873-4979
R&D Projects: GA MŠMT(CZ) ED1.1.00/02.0068; GA ČR GA106/08/1440; GA ČR GA202/08/0178
Institutional research plan: CEZ:AV0Z20410507
Institutional support: RVO:68081723
Keywords : epsilon-Fe2O3 * microwave plasma * Mossbauer spectroscopy
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.489, year: 2014

The article reports on epsilon-Fe2O3 nanoparticles synthesized in a single step by atmospheric-pressure microwave torch discharge using gaseous precursors only. Morphology and composition of the as-synthesized nanopowder were studied by HR-TEM, XRD, and Mossbauer spectroscopy. In the studied nanopowder, epsilon-Fe2O3 phase (d(XRD)=25 nm, 32 wt%) together with alpha-Fe2O3 and gamma-Fe2O3 phases was found. The characteristic epsilon-Fe2O3 and alpha/gamma-Fe2O3 sextets in the Mossbauer spectra measured at 293 and 5 K confirmed the phase composition of the powder. Compared with the methods currently used for the synthesis of epsilon-Fe2O3 nanoparticles, atmospheric-pressure microwave torch discharge appears as a new synthesis route for obtaining epsilon-Fe2O3 nanoparticles.
Permanent Link: http://hdl.handle.net/11104/0236448