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Synthesis and characterization of CoFe2O4/polyaniline nanocomposites for electromagnetic interference applications.

Synthesis and characterization of CoFe2O4/polyaniline nanocomposites for electromagnetic interference applications.

Journal of nanoscience and nanotechnology (2014-04-18)

K Praveena, S Srinath

ZUSAMMENFASSUNG

The Cobalt ferrite (CoFe2O4) powders were synthesized by Co-precipitation method. The as prepared ferrite powders were incorporated into a polyaniline matrix at various volumetric ratios. The as prepared composites of ferrite and polyaniline powders were characterized using X-ray diffraction (XRD), transmission electron microscope (TEM). The particle size of CoFe2O4 is found to be 20 nm. The saturation magnetization (M(s)) of all the composites was found to be decreasing with decrease of ferrite content, while coercivity (H(c)) remained at the value corresponding to pure cobalt ferrite nanopowders. The complex permittivity (epsilon' and epsilon") and permeability (mu' and mu") of composite samples were measured in the range of 1 MHz to 1.1 GHz. The value of epsilon' and mu' found to be increased with ferrite volume concentration.

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

Sigma-Aldrich

Eisen(III)-oxid, powder, <5 μm, ≥96%

Sigma-Aldrich

Eisen(III)-oxid, nanopowder, <50 nm particle size (BET)

Sigma-Aldrich

Eisen(III)-oxid, ≥99.995% trace metals basis

Sigma-Aldrich

Kobalt, powder, 2 μm particle size, 99.8% trace metals basis

Sigma-Aldrich

Kobalt, powder, <150 μm, ≥99.9% trace metals basis

Sigma-Aldrich

Kobalt, granular, 99.99% trace metals basis

Sigma-Aldrich

Eisen(III)-Oxid, Dispersion, nanoparticles, ≤110 nm particle size, 15 wt. % in ethanol

Sigma-Aldrich

Kobalt, Carbon coated magnetic, nanopowder, <50 nm particle size (TEM), ≥99%

Sigma-Aldrich

Kobalt, wire, diam. 1.0 mm, 99.995% trace metals basis

Sigma-Aldrich

Kobalt, pieces, 99.5% trace metals basis

Sigma-Aldrich

Kobalt, foil, thickness 0.1 mm, 99.95% trace metals basis

Sigma-Aldrich

Kobalt, rod, diam. 5.0 mm, 99.95% trace metals basis

Kobalt, foil, 100x100mm, thickness 2.0mm, as rolled, 99.9%

Sigma-Aldrich

Kobalt, foil, thickness 1.0 mm, 99.95% trace metals basis

Kobalt, foil, 100x100mm, thickness 1.0mm, as rolled, 99.9%

Kobalt, foil, 100x100mm, thickness 0.25mm, as rolled, 99.9%

Sigma-Aldrich

Kobalt, foil, thickness 0.1 mm, ≥99.99%

Kobalt, wire reel, 0.5m, diameter 0.05mm, hard, 99.9%

Kobalt, foil, 25x25mm, thickness 1.0mm, as rolled, 99.9%

Kobalt, wire reel, 0.1m, diameter 0.5mm, hard, 99.99+%

Kobalt, wire reel, 0.1m, diameter 0.05mm, hard, 99.9%

Kobalt, wire reel, 0.05m, diameter 0.25mm, hard, 99.99+%

Kobalt, foil, not light tested, 150x150mm, thickness 0.025mm, 99.9%

Kobalt, wire reel, 0.05m, diameter 0.5mm, hard, 99.99+%

Kobalt, foil, 4mm disks, thickness 0.005mm, 99.9%

Kobalt, microfoil, disks, 10mm, thinness 0.5μm, specific density 434μg/cm², permanent mylar 3.5μm support, 99.9%

Kobalt, foil, 10mm disks, thickness 0.015mm, 99.9%

Kobalt, foil, 6mm disks, thickness 0.008mm, 99.9%

Kobalt, foil, 8mm disks, thickness 0.006mm, 99.9%

Kobalt, foil, 8mm disks, thickness 0.009mm, 99.9%