The tunable microwave absorption properties of the Co–Zr co-substituted CoW-type hexagonal ferrites
Journal of Materials Science: Materials in Electronics, ISSN: 1573-482X, Vol: 31, Issue: 23, Page: 20908-20918
2020
- 11Citations
- 6Captures
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Article Description
Co–Zr co-substituted W-type hexagonal ferrites with chemical composition BaCoFe(CoZr)O.(x = 0.0, 0.4, 0.8, and 1.2) have been synthesized using a sol–gel self-propagating combustion method. The phase and microstructure were determined using XRD and FESEM, respectively. The results show that the diffraction peaks of all samples are in accordance with W-type ferrite phase without other impure phases. The flake-shaped crystals are formed when x ≤ 0.4, and changed into irregular particles with further increasing x. The electromagnetic parameters have been measured in the frequency range of 1 to 18 GHz using a vector network analyzer. The ε′ and ε′′ of ferrite are increased in whole frequency and the magnetic resonance peak shift to high frequency when x = 0.4. It can be observed that composition x = 0.4 possesses highest RL peak of − 28.63, − 37.84, and − 21.98 dB at 15.70, 16.30, and 16.98 GHz when the thickness is 5.2, 5.0, and 4.8 mm, respectively. And it also exhibits − 10 dB wideband absorption bandwidth of 1.87 GHz, 2.47 GHz, 2.72 GHz, and 2.21 GHz when the thickness ranges from 4.8 to 5.5 mm. The microwave absorption can be tuned by thickness and substitution of Co and Zr ions. The large RL suggests that the compositions could play a great potential in the application of microwave absorbing technology.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85092640598&origin=inward; http://dx.doi.org/10.1007/s10854-020-04605-y; https://link.springer.com/10.1007/s10854-020-04605-y; https://link.springer.com/content/pdf/10.1007/s10854-020-04605-y.pdf; https://link.springer.com/article/10.1007/s10854-020-04605-y/fulltext.html; https://dx.doi.org/10.1007/s10854-020-04605-y; https://link.springer.com/article/10.1007/s10854-020-04605-y
Springer Science and Business Media LLC
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