Jump to main content
Jump to site search

Issue 32, 2018
Previous Article Next Article

Bio-gel derived nickel/carbon nanocomposites with enhanced microwave absorption

Author affiliations

Abstract

A bio-gel derived strategy was used to construct Ni/C nanocomposites consisting of three-dimensional (3-D) carbon networks with embedded nickel nanoparticles. The amorphous carbon prevents agglomeration of the nickel nanoparticles and thus contributes to a good impedance match. The microwave absorption properties of the Ni/C nanocomposites were optimized according to percolation theory for good impedance matching. As a result, microwave absorbing coatings, which have the advantages of thin thickness (1.75 and 1.5 mm) and light weight (25 and 30 wt%), were achieved with excellent absorbing properties (90% microwave absorption) and a broad bandwidth (13.6–18 GHz and 13.2–18 GHz). The absorbing properties were mainly attributed to the dielectric relaxation processes at 2–18 GHz from the multilevel interface, porous carbon materials and nanoscale nickel nanoparticles in the Ni/C nanocomposites. It is believed that this work not only helps to elucidate the mechanism of absorption but also provides a new design paradigm for determining the optimal content of absorbers using percolation theory. The bio-gel derived strategy paves a possible way for the mass synthesis of microwave absorbers.

Graphical abstract: Bio-gel derived nickel/carbon nanocomposites with enhanced microwave absorption

Back to tab navigation

Supplementary files

Publication details

The article was received on 02 May 2018, accepted on 11 Jun 2018 and first published on 11 Jun 2018


Article type: Paper
DOI: 10.1039/C8TC02127A
Citation: J. Mater. Chem. C, 2018,6, 8812-8822
  •   Request permissions

    Bio-gel derived nickel/carbon nanocomposites with enhanced microwave absorption

    P. Xie, H. Li, B. He, F. Dang, J. Lin, R. Fan, C. Hou, H. Liu, J. Zhang, Y. Ma and Z. Guo, J. Mater. Chem. C, 2018, 6, 8812
    DOI: 10.1039/C8TC02127A

Search articles by author

Spotlight

Advertisements