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Manipulated electromagnetic losses by integrating chemically heterogeneous components in Fe-based core/shell architecture
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10.1063/1.4792669
/content/aip/journal/jap/113/8/10.1063/1.4792669
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/8/10.1063/1.4792669

Figures

Image of FIG. 1.
FIG. 1.

HR-TEM images and EDS analysis of the core/shell nanocapsules: (a), (b) and (b`) for Fe/Al2O3; (c) and (c`) for Fe/TiFe2O4; (d) and (d`) for Fe/MnFe2O4.

Image of FIG. 2.
FIG. 2.

FTIR spectra of the core/shell nanocapsules. (a) Fe/TiFe2O4, (b) Fe/MnFe2O4, and (c) Fe/Al2O3. In each figure, the FTIR spectra of the micro-sized oxides and Fe nanoparticles are shown for comparison.

Image of FIG. 3.
FIG. 3.

(a) Oxygen potential diagrams of Fe and heterogeneous oxides (TiO2, MnO, and Al2O3); 18 (b) XRD patterns of the core/shell nanocapsules. (i) Fe/TiFe2O4, (ii) Fe/MnFe2O4, and (iii) Fe/Al2O3.

Image of FIG. 4.
FIG. 4.

Frequency dependence of (a) complex permeability ( ) and (b) complex permittivity ( ) of Fe/TiFe2O4, Fe/MnFe2O4, and Fe/Al2O3 nanocapsules.

Image of FIG. 5.
FIG. 5.

(a) Calculated GGA electronic DOS and down-spin band structures of (b) TiFe2O4, and (c) MnFe2O4.

Image of FIG. 6.
FIG. 6.

Frequency dependence of the RL of (a) Fe/TiFe2O4, (b) Fe/MnFe2O4, and (c) Fe/Al2O3 nanocapsules in a frequency range of 2–18 GHz. The curves in (a) and (b) represent the optimal RL in Fe/TiFe2O4 and Fe/MnFe2O4 at absorber thicknesses of 2.3 mm and 1.6 mm, respectively.

Tables

Generic image for table
Table I.

Microwave absorption performance of the metal/oxide nanocapsules/paraffin composites and other reported composites.

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/content/aip/journal/jap/113/8/10.1063/1.4792669
2013-02-27
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Manipulated electromagnetic losses by integrating chemically heterogeneous components in Fe-based core/shell architecture
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/8/10.1063/1.4792669
10.1063/1.4792669
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