Enhanced microwave absorption properties in polyaniline and nano-ferrite composite in X-band

Highly conducting polyaniline (PANI) nanocomposite with Mn 0.2Ni 0.4Zn 0.4Fe 2O 4 ferrite was prepared by mechanical blending. The present work reports the EMI shielding characteristics of the ferrite-Pani nanocomposite with different thickness. The saturation magnetization (Ms) for pure MnNiZn ferr...

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Bibliographic Details
Published in:Synthetic metals 2010-11, Vol.160 (21), p.2315-2318
Main Authors: Gairola, S.P., Verma, Vivek, Kumar, Lalit, Dar, M. Abdullah, Annapoorni, S., Kotnala, R.K.
Format: Article
Language:English
Subjects:
Applied sciences
Composites
Conducting polyaniline
Exact sciences and technology
Ferrite
Ferrites
Forms of application and semi-finished materials
Frequency ranges
Nanocomposite
Nanocomposites
Nanomaterials
Nanostructure
Polyanilines
Polymer industry, paints, wood
Shielding
Shielding effectiveness
Technology of polymers
X-band
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Summary:Highly conducting polyaniline (PANI) nanocomposite with Mn 0.2Ni 0.4Zn 0.4Fe 2O 4 ferrite was prepared by mechanical blending. The present work reports the EMI shielding characteristics of the ferrite-Pani nanocomposite with different thickness. The saturation magnetization (Ms) for pure MnNiZn ferrite (52 emu/g) and composite (41 emu/g) was measured by VSM at room temperature. The crystalline size of MnNiZn ferrite was found in the range of 25–30 nm as analyzed by TEM and XRD. The complex permittivity, permeability and shielding effectiveness of the composite for different thicknesses were measured in the 8–12 GHz (X-band) frequency range. The composite of 2.5 mm thickness has shown high shielding effectiveness (49.2 dB) due to absorption ( SE A ). The high value of SE A suggests that this composite can be used as a promising absorbing material for X-band frequency range.
ISSN:0379-6779
1879-3290
DOI:10.1016/j.synthmet.2010.08.025