Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 34, Pages 22615-22622Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b05480
Keywords
nickel chains; electromagnetic property; polarization; resonance; microwave absorption
Funding
- National Natural Science Foundation of China [51132002, 51372282]
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We fabricated, the nickel chains by a-facile wet chemical method. The morphology of nickel chains were tailored by adjusting the amount of PVP during the synthesis process. Both the complex permittivity and permeability of the three-dimensional (3D) nets constructed by nickel chains present strong dependences on temperature in the frequency range of 8.2-12.4 GHz and temperature range of 323-573 K. The peaks in imaginary component of permittivity and permeability mainly derive from interfacial polarizations and resonances, devoting to dielectric and magnetic loss, respectively. The effect from both dielectric and magnetism contribute to enhancing the microwave absorption. The maximum absorption value of the 3D nickel chain nets is approximately -50 dB at 8.8 GHz and 373 K with a thickness of 1.8 mm, and the bandwidth less than 10 dB almost covers the whole investigated frequency band. These are encouraging findings, which provide the potential advantages of-magnetic transition metal-based materials for microwave absorption application at elevated temperature.
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