Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 25, Issue 8, Pages 3614-3621Publisher
SPRINGER
DOI: 10.1007/s10854-014-2064-2
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Flower-like Ni structures composed of leaf-like flakes were synthesized through a facile solvothermal approach independent of surfactants or magnetic force. The evolution of the morphology was closely related to the variation of NaOH and volume ratios of ethylene glycol to water. The microwave absorbing properties of the flower-like Ni wax-composite were evaluated based on the complex permittivity (epsilon(r) = epsilon' - j epsilon aEuro(3)) and permeability (A mu(r) = A mu aEuro(2)A a'A jA mu aEuro(3)). The Ni wax-composite exhibited excellent microwave absorption performances with a minimum reflection loss of -46.1 dB at 13.3 GHz, corresponding to a matching thickness of 2.0 mm. In particular, the absorption bandwidth of RL below -10 dB was 3.6 GHz (11.7-15.3 GHz). The attenuation of microwave could be attributed to the dielectric loss and unique flower-like structure.
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