Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 867, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159040
Keywords
Cobalt ferrite; Carbon nanotube; Microwave absorption
Categories
Funding
- National Key Research and Development Program of China [2019YFB1311100]
- National Natural Science Foundation of China [51675533, 51701238, 51905543]
- National Defense Science and Technology Excellence Young Scientists Foundation [2017-JCJQ-ZQ-001]
- Equipment Pre-research Sharing Technology Project of 13th Five-year [41404010205]
- China Postdoctoral Science Foundation [2018M643857]
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The cobalt ferrite/carbon nanotubes nanocomposite absorber materials synthesized by a solvothermal method demonstrate excellent absorption properties and a wide absorption bandwidth, making them suitable for microwave absorbers in various technological applications.
Cobalt ferrite/carbon nanotubes (CoFe2O4/CNTs) nanocomposite absorber materials were synthesized by a simple solvothermal method. The effects of CNTs on the microstructure, electromagnetic and microwave absorbing properties of CoFe2O4 were investigated systematically. Morphological analysis showed a net-work like structure where CoFe2O4 nanoparticles were connected by carbon nanotubes forming large blockshaped wave absorbers. In addition, the reflection loss of CoFe2O4/CNTs reached -37.39 dB at a thickness of 1.7 mm, along with an effective absorption bandwidth of 5.2 GHz, which shows better absorption ability than pure cobalt ferrite. The wide absorption bandwidth of the fabricated CoFe2O4/CNTs nanocomposite at such a thin thickness is highly desirable for microwave absorbers used in various technological applications. (C) 2021 Elsevier B.V. All rights reserved.
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