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Enhancement of microwave absorption bandwidth of polymer blend using ferromagnetic gadolinium silicide nanoparticles

Bora, Pritom J and Gupta, Shalabh and Pecharsky, Vitalij K and Vinoy, K J and Ramamurthy, Praveen C and Hadimani, Ravi L (2019) Enhancement of microwave absorption bandwidth of polymer blend using ferromagnetic gadolinium silicide nanoparticles. In: MATERIALS LETTERS, 252 . pp. 178-181.

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Official URL: https://dx.doi.org/10.1016/j.matlet.2019.04.013

Abstract

Ferromagnetic gadolinium silicide (Gd5Si4) nanoparticles significantly enhance the microwave absorption bandwidth of a polymer blend (PVB-PEDOT:PSS). These materials are critically needed for various military and civilian applications such as X-band (8.2-12.4 GHz) and Ku-band (12.4-18 GHz) absorption. A single 1.2 mm thick layer of PVB-PEDOT: PSS-Gd5Si4 (PPGS) nanocomposite film shows the most promising bandwidth (8.2-18 GHz) with a minimum reflection loss of -14 dB. Mechanistically, dielectric loss (tan delta(e) approximate to 2.4) and magnetic loss (tan delta(m) approximate to 1.1) contributes more efficiently, and standard microwave simulation confirms the stored energy is predominant in PPGS nanocomposite which enhances the bandwidth.

Item Type: Journal Article
Additional Information: copyright for this belongs to ELSEVIER SCIENCE BV
Keywords: Polymer nanocomposites; Dielectrics; Reflection loss (RL); RL bandwidth
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Division of Interdisciplinary Research > Interdisciplinary Centre for Energy Research
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 21 Aug 2019 06:30
Last Modified: 21 Aug 2019 06:30
URI: http://eprints.iisc.ac.in/id/eprint/63280

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