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 language | English |
|---|---|
| Pages (from-to) | 5815-5820 |
| Number of pages | 6 |
| Journal | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
| Volume | 41 |
| Issue number | 9 |
| Publication status | Published - Sep 2002 |
| Externally published | Yes |
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Keywords
- Absorption
- Microwave
- Natural rubber
- Permeability
- Permittivity
- Reflection loss
- Scattering parameters
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Effects of natural rubber on microwave absorption characteristics of some Li-Ni-Zn ferrite-thermoplastic natural rubber composites. / Abdul Hamid, Siti Atkah; Abdullah, Mustaffa Hj; Ahmad, Sahrim; Mansor, Abdul Aziz; Yusoff, Ahmad Nazlim.
In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 41, No. 9, 09.2002, p. 5815-5820.Research output: Contribution to journal › Article
}
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.
KW - Absorption
KW - Microwave
KW - Natural rubber
KW - Permeability
KW - Permittivity
KW - Reflection loss
KW - Scattering parameters
UR - http://www.scopus.com/inward/record.url?scp=0036756828&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0036756828&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0036756828
VL - 41
SP - 5815
EP - 5820
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 9
ER -