Effects of natural rubber on microwave absorption characteristics of some Li-Ni-Zn ferrite-thermoplastic natural rubber composites

Siti Atkah Abdul Hamid, Mustaffa Hj Abdullah, Sahrim Ahmad, Abdul Aziz Mansor, Ahmad Nazlim Yusoff

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A microwave (Li0.5Fe0.5)0.4Ni0.3Zn0.3 Fe2O4 (LNZ) ferrite was prepared by a conventional sintering method in air. Thermoplastic natural rubber (TPNR) was prepared from polypropylene (PP) and natural rubber (NR) in the ratios of 80:20, 70:30, 60:40, 50:50 and 40:60 with liquid natural rubber as a compatibilizer by a melt blending technique. LNZ ferrite-TPNR composites with 20 wt% ferrite filler were prepared using a Brabender plasticorder internal mixer. The microwave electromagnetic properties of the composites were studied in the frequency range of 0.3-13.5 GHz using a microwave vector network analyzer (MVNA). The real and imaginary components of the relative complex dielectric permittivity (ε*r = ε′r - jε″r) and magnetic permeability (μ*r = μ′r - jμ″r) were calculated from the measured complex scattering parameters (S*11 and S*12) using the Nicolson-Ross model. The dielectric and magnetic properties were found to depend on the NR and PP content in the composites. The minimum reflection loss (RL) under the matching conditions increases with increasing NR content.

Original languageEnglish
Pages (from-to)5815-5820
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume41
Issue number9
Publication statusPublished - Sep 2002
Externally publishedYes

Fingerprint

microwave absorption
rubber
Thermoplastics
Ferrite
ferrites
Rubber
Microwaves
composite materials
Composite materials
polypropylene
microwaves
Polypropylenes
Magnetic permeability
Electric network analyzers
Compatibilizers
electromagnetic properties
Scattering parameters
fillers
Dielectric properties
Fillers

Keywords

  • Absorption
  • Microwave
  • Natural rubber
  • Permeability
  • Permittivity
  • Reflection loss
  • Scattering parameters

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

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title = "Effects of natural rubber on microwave absorption characteristics of some Li-Ni-Zn ferrite-thermoplastic natural rubber composites",
abstract = "A microwave (Li0.5Fe0.5)0.4Ni0.3Zn0.3 Fe2O4 (LNZ) ferrite was prepared by a conventional sintering method in air. Thermoplastic natural rubber (TPNR) was prepared from polypropylene (PP) and natural rubber (NR) in the ratios of 80:20, 70:30, 60:40, 50:50 and 40:60 with liquid natural rubber as a compatibilizer by a melt blending technique. LNZ ferrite-TPNR composites with 20 wt{\%} ferrite filler were prepared using a Brabender plasticorder internal mixer. The microwave electromagnetic properties of the composites were studied in the frequency range of 0.3-13.5 GHz using a microwave vector network analyzer (MVNA). The real and imaginary components of the relative complex dielectric permittivity (ε*r = ε′r - jε″r) and magnetic permeability (μ*r = μ′r - jμ″r) were calculated from the measured complex scattering parameters (S*11 and S*12) using the Nicolson-Ross model. The dielectric and magnetic properties were found to depend on the NR and PP content in the composites. The minimum reflection loss (RL) under the matching conditions increases with increasing NR content.",
keywords = "Absorption, Microwave, Natural rubber, Permeability, Permittivity, Reflection loss, Scattering parameters",
author = "{Abdul Hamid}, {Siti Atkah} and Abdullah, {Mustaffa Hj} and Sahrim Ahmad and Mansor, {Abdul Aziz} and Yusoff, {Ahmad Nazlim}",
year = "2002",
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TY - JOUR

T1 - Effects of natural rubber on microwave absorption characteristics of some Li-Ni-Zn ferrite-thermoplastic natural rubber composites

AU - Abdul Hamid, Siti Atkah

AU - Abdullah, Mustaffa Hj

AU - Ahmad, Sahrim

AU - Mansor, Abdul Aziz

AU - Yusoff, Ahmad Nazlim

PY - 2002/9

Y1 - 2002/9

N2 - A microwave (Li0.5Fe0.5)0.4Ni0.3Zn0.3 Fe2O4 (LNZ) ferrite was prepared by a conventional sintering method in air. Thermoplastic natural rubber (TPNR) was prepared from polypropylene (PP) and natural rubber (NR) in the ratios of 80:20, 70:30, 60:40, 50:50 and 40:60 with liquid natural rubber as a compatibilizer by a melt blending technique. LNZ ferrite-TPNR composites with 20 wt% ferrite filler were prepared using a Brabender plasticorder internal mixer. The microwave electromagnetic properties of the composites were studied in the frequency range of 0.3-13.5 GHz using a microwave vector network analyzer (MVNA). The real and imaginary components of the relative complex dielectric permittivity (ε*r = ε′r - jε″r) and magnetic permeability (μ*r = μ′r - jμ″r) were calculated from the measured complex scattering parameters (S*11 and S*12) using the Nicolson-Ross model. The dielectric and magnetic properties were found to depend on the NR and PP content in the composites. The minimum reflection loss (RL) under the matching conditions increases with increasing NR content.

AB - A microwave (Li0.5Fe0.5)0.4Ni0.3Zn0.3 Fe2O4 (LNZ) ferrite was prepared by a conventional sintering method in air. Thermoplastic natural rubber (TPNR) was prepared from polypropylene (PP) and natural rubber (NR) in the ratios of 80:20, 70:30, 60:40, 50:50 and 40:60 with liquid natural rubber as a compatibilizer by a melt blending technique. LNZ ferrite-TPNR composites with 20 wt% ferrite filler were prepared using a Brabender plasticorder internal mixer. The microwave electromagnetic properties of the composites were studied in the frequency range of 0.3-13.5 GHz using a microwave vector network analyzer (MVNA). The real and imaginary components of the relative complex dielectric permittivity (ε*r = ε′r - jε″r) and magnetic permeability (μ*r = μ′r - jμ″r) were calculated from the measured complex scattering parameters (S*11 and S*12) using the Nicolson-Ross model. The dielectric and magnetic properties were found to depend on the NR and PP content in the composites. The minimum reflection loss (RL) under the matching conditions increases with increasing NR content.

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KW - Permeability

KW - Permittivity

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KW - Scattering parameters

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