Effect of Coral-Shaped Yttrium Iron Garnet Particles on the EMI Shielding Behaviour of Yttrium Iron Garnet-Polyaniline-Wax Composites

Choudhary, Harish Kumar and Kumar, Rajeev and Pawar, Shital Patangrao and Anupama, AV and Bose, Suryasarathi and Sahoo, Balaram (2018) Effect of Coral-Shaped Yttrium Iron Garnet Particles on the EMI Shielding Behaviour of Yttrium Iron Garnet-Polyaniline-Wax Composites. In: CHEMISTRYSELECT, 3 (7). pp. 2120-2130.

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Abstract

We report the physicochemical insight into the role of coral-shaped yttrium-iron-garnet (YIG) particles for high electromagnetic interference (EMI) shielding behaviour of YIG-polyaniline (PANI)-Wax composites. We studied the total shielding effectiveness (SET) of various compositions of the composites in X and K-u-band frequencies (8-18 GHz) and came upon with a critical concentration (20 wt% of YIG) for which SET is maximum (-44.8 dB). At this critical concentration, the coral shape of YIG helps in effectively increasing the YIG-PANI interfaces necessary for the multiple scattering of electromagnetic (EM) waves. The scattered microwave is then trapped within the dense coral-network of YIG until they are absorbed therein by PANI via conduction loss; thereby, dramatically enhancing the microwave attenuation. The detailed EMI shielding mechanism is explained based on electrical and magnetic properties of the composites. Our result demonstrates the importance of morphology of the dielectric/magnetic particles and their concentration in the composites for designing an efficient EMI shield.

Item Type:	Journal Article
Publication:	CHEMISTRYSELECT
Additional Information:	Copy right for the article belong to WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	27 Mar 2018 18:28
Last Modified:	21 Feb 2019 09:40
URI:	http://eprints.iisc.ac.in/id/eprint/59392

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