Accession Number:

ADA610545

Title:

Low Loss Polymer Nanoparticle Composites for RF Applications

Descriptive Note:

Final rept. 1 Jun 2009-30 Aug 2014

Corporate Author:

MARYLAND UNIV COLLEGE PARK

Personal Author(s):

Report Date:

2014-09-17

Pagination or Media Count:

35.0

Abstract:

The aim of this project was the development of flexible magneto-dielectric polymer composites consisting of core-shell iron nanoparticles that possess high permeability , high permittivity and minimal dielectric loss tan . We have reported a novel method to obtain high permeability, low loss polymer composites with FeAg core-shell nanoparticles. The noble metal Ag shell layer provides protection against oxidation of the Fe core yet, FeAg nanoparticles cannot achieve high saturation magnetization Ms. We optimized the synthesis of the FeAg core-shell nanoparticles to suppress the formation of ferrous oxide, thus enhance and decreasing loss. Additionally, we have characterized the change in magnetic properties of the FeAg core-shell nanoparticles during oxidation, to demonstrate the influence of oxidation on the Ms of the FeAg core-shell nanoparticles. We also report a method to fabricate highly conductive strain-stable materials.

Subject Categories:

  • Polymer Chemistry
  • Laminates and Composite Materials
  • Electricity and Magnetism
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE