Publication Date

4-13-2019

Department

Ames Laboratory; Electrical and Computer Engineering; Materials Science and Engineering

Campus Units

Ames Laboratory, Electrical and Computer Engineering, Materials Science and Engineering

OSTI ID+

1529366

Report Number

IS-J 9960

DOI

10.1016/j.matlet.2019.04.013

Journal Title

Materials Letters

Volume Number

252

First Page

178

Last Page

181

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 δe ≈2.4) and magnetic loss (tan δm ≈1.1) contributes more efficiently, and standard microwave simulation confirms the stored energy is predominant in PPGS nanocomposite which enhances the bandwidth.

DOE Contract Number(s)

AC02-07CH11358

Language

en

Publisher

Iowa State University Digital Repository, Ames IA (United States)

Available for download on Monday, April 13, 2020

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