Core/Shell Iron/Oxide Nanoparticles for Improving the Magneto-Dielectric Properties of Polymer Composites

Ta I. Yang, Chun Yu Chuang, Shu Chian Yang, Leo C. Kempel, Peter Kofinas

Research output: Contribution to journalArticle

  • 2 Citations

Abstract

A simple method to obtain high magnetic permeability (μr), high dielectric permittivity (εr), and low loss polymer composites with core/shell iron/metal oxide particles is developed. Magnetic iron (Fe0) particles with protective SiO2 shells are synthesized in aqueous environment at room temperature. The shells provide electrical insulting layers which decrease energy loss and also prevent the possibility of μr decrease due to Fe0 oxidation. Furthermore, Fe0 particles could also be coated with TiO2 shells which allow εr to be tuned. The εr and μr of the resulting polydimethylsiloxane composites are optimized for core-shell particle doping. The value of εr is up to 9.8 and most importantly, the μ is close to 2 at 1 GHz with 43 wt% doping of core-shell particles. The dielectric loss of the composites is less than 0.02.

LanguageEnglish (US)
Pages121-126
Number of pages6
JournalAdvanced Engineering Materials
Volume18
Issue number1
DOIs
StatePublished - Jan 1 2016

Profile

Iron oxides
iron oxides
Dielectric properties
dielectric properties
Polymers
Nanoparticles
nanoparticles
composite materials
Composite materials
polymers
Iron
Doping (additives)
Magnetic permeability
Polydimethylsiloxane
Dielectric losses
Oxides
Energy dissipation
Permittivity
Metals
Oxidation

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Core/Shell Iron/Oxide Nanoparticles for Improving the Magneto-Dielectric Properties of Polymer Composites. / Yang, Ta I.; Chuang, Chun Yu; Yang, Shu Chian; Kempel, Leo C.; Kofinas, Peter.

In: Advanced Engineering Materials, Vol. 18, No. 1, 01.01.2016, p. 121-126.

Research output: Contribution to journalArticle

Yang, Ta I. ; Chuang, Chun Yu ; Yang, Shu Chian ; Kempel, Leo C. ; Kofinas, Peter. / Core/Shell Iron/Oxide Nanoparticles for Improving the Magneto-Dielectric Properties of Polymer Composites. In: Advanced Engineering Materials. 2016 ; Vol. 18, No. 1. pp. 121-126
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