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Journal of Nanoparticle Research
Erschienen in: Journal of Nanoparticle Research 1/2011

01.01.2011 | Research Paper

Effect of the concentration of precursors on the microwave absorbent properties of Zn/Fe oxide nanopowders

verfasst von: P. C. Fannin, C. N. Marin, I. Malaescu, N. Stefu, P. Vlăzan, S. Novaconi, S. Popescu

Erschienen in: Journal of Nanoparticle Research | Ausgabe 1/2011

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Abstract

Zn/Fe oxide compound powders were obtained by the hydrothermal method using ferric nitrate Fe(NO3)3·9H2O and zinc nitrate Zn(NO3)2·6H2O at 200 °C and different precursor molar ratios x = Fe3+/Zn2+ equal to 2.8/0.2, 2.5/0.5, 1.8/1.2 and 1.5/1.5. The samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy/energy dispersive X-ray analysis (SEM–EDAX). Room temperature measurements of the frequency dependence of the complex magnetic permeability and complex dielectric permittivity, over the frequency range from 0.1 to 6 GHz, were performed. For precursor molar ratios x = 2.8/0.2, x = 1.8/1.2 and x = 1.5/1.5 the obtained samples showed a ferromagnetic-like resonance behaviour. This behaviour was assigned to the prevalent compounds in the obtained samples, Fe2O3 (for x = 2.8/0.2) and ZnFe2O4 (for x = 1.8/1.2 and x = 1.5/1.5). Based on the magnetic and dielectric measurements, the microwave absorbent properties of the four samples were analysed, and the sample containing mostly of ZnFe2O4 (for x = 1.8/1.2) was found to be the best electromagnetic absorber in the frequency range 1.36–6 GHz.
Vorheriger Artikel Internalisation of engineered nanoparticles into mammalian cells in vitro: influence of cell type and particle properties
Nächster Artikel Cu x Ni1−x alloy nanoparticles embedded SiO2 films: synthesis and structure

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Metadaten
Titel
Effect of the concentration of precursors on the microwave absorbent properties of Zn/Fe oxide nanopowders
verfasst von
P. C. Fannin
C. N. Marin
I. Malaescu
N. Stefu
P. Vlăzan
S. Novaconi
S. Popescu
Publikationsdatum
01.01.2011
Verlag
Springer Netherlands
Erschienen in
Journal of Nanoparticle Research / Ausgabe 1/2011
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI
https://doi.org/10.1007/s11051-010-0032-1

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