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.

	PDF mat_let_252_178_2019.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy
Preview	PDF 1-s2.0-S0167577X19305634-mmc1.pdf - Published Supplemental Material Download (371kB) | Preview

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
Publication:	MATERIALS LETTERS
Publisher:	ELSEVIER SCIENCE BV
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 Sciences > Interdisciplinary Centre for Energy Research Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	21 Aug 2019 06:30
Last Modified:	21 Aug 2019 06:30
URI:	http://eprints.iisc.ac.in/id/eprint/63280

Actions (login required)

View Item