Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 502, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2020.166543
Keywords
Core-shell structure; Hollow ZnFe2O4; Reflection loss; Microwave absorption
Funding
- key scientific research projects of the Southwest University of Science and Technology [17zx910201]
- Longshan academic talent research supporting program of SWUST [18LZX437, 18LZXT09]
- Sichuan science and technology program [2017TD0020]
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The hollow ZnFe2O4@C composites with core-shell structure were successfully synthesized through a simple method. SEM and TEM results illustrate that the hollow ZnFe2O4@C composites are of core-shell structure with an average diameter of about 200 nm. Compare with hollow ZnFe2O4, the as-prepared hollow ZnFe2O4@C composites exhibit excellent microwave absorption properties in terms of the minimum reflection loss, the thickness and the absorption bandwidth. The minimum reflection loss of hollow ZnFe2O4@C composites is -51.38 dB at 15.39 GHz with the thickness of 2.0 mm and the absorption bandwidth below -10 dB is up to 4.10 GHz (12.56-16.66 GHz) with the thickness of 2.2 mm. These excellent absorbing properties are result to the multi-component synergistic effect and its unique structure.
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