Journal
CERAMICS INTERNATIONAL
Volume 49, Issue 22, Pages 36866-36878Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2023.09.017
Keywords
Porous structure; Ni-MOF74; Nano nickel; Absorbing materials
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Ni0.5Zn0.5Fe2O4@Ni-MOF74 composites were synthesized and carbonized to obtain Ni05Zn0.5Fe2O4@Ni/C porous heterogeneous composites. The generation of porous structure and dispersed distribution of nanoscale nickel metal improve the dielectric loss capacity and absorption performance of the material.
Ni0.5Zn0.5Fe2O4@Ni-MOF74 composites were synthesized using sol-gel method and solvothermal method. Ni05Zn0.5Fe2O4@Ni/C porous heterogeneous composites were obtained by carbonization of Ni0.5Zn0.5Fe2O4@Ni- MOF74 in an Ar atmosphere at 600 degrees C. The generation of the porous structure and the dispersed distribution of nanoscale nickel metal are advantageous for improving the material's dielectric loss capacity. As a result, the composite material's impedance matching is optimized, and the absorption performance is improved. The content of carbon and nanoscale nickel metal can be controlled by the amount of Ni-MOF74 in the composites. At 14.18 GHz, the composite with 30% Ni-MOF74 (wt%) attained an ideal reflection loss of-49.66 dB, at a coating of 1.93 mm and an effective absorption bandwidth of 7.31 GHz, exhibiting excellent microwave absorption performance.
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