Low Loss Polymer Nanoparticle Composites for RF Applications

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 Fe/Ag core-shell nanoparticles. The noble metal (Ag) shell layer provides protection against oxidation of the Fe core yet, Fe/Ag nanoparticles cannot achieve high saturation magnetization (Ms). We optimized the synthesis of the Fe/Ag 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 Fe/Ag core-shell nanoparticles during oxidation, to demonstrate the influence of oxidation on the Ms of the Fe/Ag core-shell nanoparticles. We also report a method to fabricate highly conductive strain-stable materials.

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Document Details

Document Type
Technical Report
Publication Date
Sep 17, 2014
Accession Number
ADA610545

Entities

People

  • Peter Kofinas

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Advanced Electronics
  • Sensors

DTIC Thesaurus Topics

  • Chemistry
  • Dielectrics
  • Electrical Properties
  • Electron Microscopes
  • Electron Microscopy
  • Fabrication
  • Magnetic Materials
  • Magnetic Nanoparticles
  • Magnetic Properties
  • Materials Laboratories
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Metallic Nanoparticles
  • Microscopes

Fields of Study

  • Materials science

Readers

  • Microwave Engineering.
  • Nanocomposite Materials Science
  • Superconducting Magnet Technology

Technology Areas

  • Biotechnology