Iron-Based Nanopowders Containing alfa-Fe, Fe3C, and gamma-Fe Particles Synthesised in Microwave Torch Plasma and Investigated with Mossbauer Spectroscopy

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Authors

DAVID Bohumil PIZÚROVÁ Naděžda SCHNEEWEISS Oldřich KUDRLE Vít JAŠEK Ondřej SYNEK Petr

Year of publication 2011
Type Article in Periodical
Magazine / Source Japanese Journal of Applied Physics
MU Faculty or unit

Faculty of Science

Citation
Doi http://dx.doi.org/10.1143/JJAP.50.08JF11
Field Plasma physics
Keywords CARBON NANOTUBES; ATMOSPHERIC-PRESSURE; PHASE SYNTHESIS; GAS-PHASE; NANOPARTICLES; GAMMA-Fe; iron pentacarbonyle
Attached files
Description Two Fe-based nanopowders were synthesised using microwave torch discharge at 1 bar. The main channel of the discharge was operating in Ar, which flowed through the central nozzle of an electrode, whereas the reactive mixture H(2)/Fe(CO)(5) was added through a concentric outer nozzle. Besides rarely observed gamma-Fe particles (for the first sample: d(XRD) = 30 nm, 35 wt %; for the second sample: d(XRD) = 9 nm, 33wt %) samples also included alpha-Fe, Fe(3)C, and Fe(3)O(4)/gamma-Fe(2)O(3) particles. The presence of gamma-Fe phase was proved by the interpretation of the XRD patterns and the Mossbauer spectra taken at 293 and 5 K.
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