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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

ABSTRACT

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.

MATERIALS

Product Number

Brand

Product Description

Sigma-Aldrich

Iron(III) oxide, nanopowder, <50 nm particle size (BET)

Sigma-Aldrich

Iron(III) oxide, ≥99.995% trace metals basis

Sigma-Aldrich

Iron(III) oxide, powder, <5 μm, ≥96%

Sigma-Aldrich

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

Sigma-Aldrich

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

Sigma-Aldrich

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

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Cobalt, pieces, 99.5% trace metals basis

Sigma-Aldrich

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

Sigma-Aldrich

Iron(III) oxide, dispersion, nanoparticles, ≤110 nm particle size, 15 wt. % in ethanol

Sigma-Aldrich

Cobalt, foil, thickness 0.1 mm, ≥99.99%

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

Sigma-Aldrich

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

Sigma-Aldrich

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

Sigma-Aldrich

Cobalt, granular, 99.99% trace metals basis

Cobalt, foil, 6mm disks, thickness 0.25mm, as rolled, 99.99+%

Cobalt, foil, 4mm disks, thickness 0.009mm, 99.9%

Cobalt, foil, 8mm disks, thickness 0.01mm, 99.9%

Cobalt, foil, 6mm disks, thickness 0.025mm, 99.9%

Cobalt, foil, 4mm disks, thickness 0.125mm, annealed, 99.9%

Cobalt, foil, 25mm disks, thickness 0.125mm, annealed, 99.9%

Cobalt, foil, 6mm disks, thickness 0.005mm, 99.9%

Cobalt, foil, 4mm disks, thickness 0.0125mm, 99.9%

Cobalt, foil, 6mm disks, thickness 0.007mm, 99.9%

Cobalt, foil, 8mm disks, thickness 0.025mm, 99.9%

Cobalt, foil, 6mm disks, thickness 0.02mm, 99.9%

Cobalt, foil, 25mm disks, thickness 0.25mm, as rolled, 99.9%

Cobalt, foil, not light tested, 25x25mm, thickness 0.003mm, 99.9%

Cobalt, foil, 6mm disks, thickness 0.006mm, 99.9%

Cobalt, foil, 8mm disks, thickness 0.004mm, 99.9%

Cobalt, foil, light tested, 50x50mm, thickness 0.025mm, 99.9%