title: Enhanced microwave absorbing performance of CoNi alloy nanoparticles anchored on a spherical carbon monolith.
abstract: CoNi alloy nanoparticles anchored on a spherical carbon monolith (CoNi-C) were prepared by a solvothermal route and subsequent heat treatment without any templates. Their permittivity and permeability behaviors were studied in the frequency range of 2-18 GHz. The CoNi-C composites showed the best microwave absorbing performances compared to those of Co-C and Ni-C. The maximum reflection loss of the CoNi-C nanocomposites can reach -50.2 dB at 7.7 GHz with samples of 4 mm in thickness, better than that of the Ni-C composites, while the Co-C composites showed almost no absorption at all. The absorption mechanism of the three absorbents was also discussed.
authors.affiliation: Key Laboratory of Cluster Science, Ministry of Education of China, Department of Chemistry, Beijing Institute of Technology, Beijing 100081, PR China.
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.forename: Changwen
authors.initials: C
authors.lastname: Hu
authors.forename: Minhua
authors.initials: M
authors.lastname: Cao
mesh_terms: D000497:Alloys / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008872:Microwaves; D009532:Nickel / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D000497:Alloys; D003035:Cobalt; D002244:Carbon; D009532:Nickel