Please use this identifier to cite or link to this item: https://doi.org/10.1088/0022-3727/42/9/095007
Title: Doping effect on microwave reflection characteristics for W-type ferrite/epoxy composites
Authors: Li, Z.W. 
Lin, G.Q. 
Wu, Y.P. 
Kong, L.B. 
Issue Date: 7-May-2009
Citation: Li, Z.W., Lin, G.Q., Wu, Y.P., Kong, L.B. (2009-05-07). Doping effect on microwave reflection characteristics for W-type ferrite/epoxy composites. Journal of Physics D: Applied Physics 42 (9) : -. ScholarBank@NUS Repository. https://doi.org/10.1088/0022-3727/42/9/095007
Abstract: The reflection properties have been studied for BaCoZnFe16O 27 composites doped with 0.5 wt% CaO, Bi2O3, SiO2, and 1 wt% Nb2O5 and V2O 5. For composites undoped and doped with SiO2, Nb 2O5 and V2O5 two matching thicknesses, tm1 and tm2, and two corresponding matching frequencies, fm1 and fm2, are observed. tm1 has its origin in the quarter wavelength matching condition and tm2 is related to the magnetic resonance. As compared with the original composite, doping of CaO, Bi2O3 and SiO2 deteriorates the reflection properties of composites due to a large increase in ε′, which leads to a mismatch between the material and free space. On the other hand, doping of Nb2O5 and V2O5 can significantly improve the reflectivity and bandwidth, due to enhanced μ′0 and μ″max, and almost unchanged ε′. The two composites doped with Nb2O5 and V2O5 are potential candidates for use as EM materials with low reflectivity and broad bandwidth at microwave frequency. © 2009 IOP Publishing Ltd.
Source Title: Journal of Physics D: Applied Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/111370
ISSN: 00223727
DOI: 10.1088/0022-3727/42/9/095007
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