Improved dielectric and magnetic properties of 1-3-type Ni0.5Zn0.5Fe2O4/epoxy composites for high-frequency applications

Ni0.5Zn0.5Fe2O4 (NZO)/epoxy composites with 1-3-type structure consisting of NZO rods in an epoxy matrix were fabricated by the dice and fill technique, with volume fraction from 40% to 70%. Improved frequency stability of the dielectric and magnetic properties was obtained in the frequency range fr...

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Veröffentlicht in:Journal of physics. D, Applied physics Applied physics, 2013-02, Vol.46 (12)
Hauptverfasser: He, Li, Yang, Haibo, Zhou, Di, Niu, Yujuan, Xiang, Feng, Wang, Hong
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container_issue 12
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container_title Journal of physics. D, Applied physics
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creator He, Li
Yang, Haibo
Zhou, Di
Niu, Yujuan
Xiang, Feng
Wang, Hong
description Ni0.5Zn0.5Fe2O4 (NZO)/epoxy composites with 1-3-type structure consisting of NZO rods in an epoxy matrix were fabricated by the dice and fill technique, with volume fraction from 40% to 70%. Improved frequency stability of the dielectric and magnetic properties was obtained in the frequency range from 10 MHz to 1 GHz. The optimized composite sample with 60% NZO rods in volume showed high dielectric and magnetic performance with permittivity between 9.2 and 10.3, dielectric loss between 0.09 and 0.25 in the frequency range from 50 MHz to 1 GHz, and permeability between 5.3 and 5.6, magnetic loss between 0.02 and 0.54 in the frequency range from 10 MHz to 1 GHz, respectively. Moreover, its permeability μ′ was increased to 170%, and the magnetic loss tan δμ was reduced to only 80% compared with the conventional 0-3-type composites with 40 vol% fillers at 1 GHz. The modelling and simulation results by Ansoft HFSS provided a reasonable explanation for the experimental results.
doi_str_mv 10.1088/0022-3727/46/12/125003
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subjects Condensed matter: electronic structure, electrical, magnetic, and optical properties
Dielectric loss and relaxation
Dielectric properties of solids and liquids
Dielectrics, piezoelectrics, and ferroelectrics and their properties
Exact sciences and technology
Magnetic properties and materials
Permittivity (dielectric function)
Physics
title Improved dielectric and magnetic properties of 1-3-type Ni0.5Zn0.5Fe2O4/epoxy composites for high-frequency applications
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