Gairola, S. P. and Verma, Vivek and Kuma, Lalit and Dar, M. Abdullah and S. , Annapoorni and Kotnala, R. K. (2010) Enhanced microwave absorption properties in polyaniline and nano-ferrite composite in X-band. Synthetic Metals, 160 (21-22). pp. 2315-2318. ISSN 0379-6779

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Abstract

Highly conducting polyaniline (PANI) nanocomposite with Mn0.2Ni0.4Zn0.4Fe2O4 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 (SEA). The high value of SEA suggests that this composite can be used as a promising absorbing material for X-band frequency range.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords:	Conducting polyaniline; Ferrites; Nanocomposite; Shielding effectiveness
Subjects:	Materials Science Physics Polymer Science
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	13 Apr 2012 06:55
Last Modified:	13 Apr 2012 06:55
URI:	http://npl.csircentral.net/id/eprint/130

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