title: Facile Synthesis of Porous Nickel/Carbon Composite Microspheres with Enhanced Electromagnetic Wave Absorption by Magnetic and Dielectric Losses.
abstract: Porous nickel/carbon (Ni/C) composite microspheres with diameters of ca. 1.2-1.5 μm were fabricated by a solvothermal method combined with carbon reduction. The pore size of the synthesized Ni/C composite microspheres ranged from several nanometers to 50 nm. The porous Ni/C composite microspheres exhibited a saturation magnetization (MS) of 53.5 emu g(-1) and a coercivity (HC) of 51.4 Oe. When tested as an electromagnetic (EM) wave absorption material, the epoxy resin composites containing 60% and 75% porous Ni/C microspheres provided high-performance EM wave absorption at thicknesses of 3.0-11.0 and 1.6-7.0 mm in the corresponding frequency ranges of 2.0-12 and 2.0-18 GHz, respectively. The superior EM wave absorption performances of porous Ni/C composite microspheres were derived from the synergy effects generated by the magnetic loss of nickel, the dielectric loss of carbon, and the porous structure.
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University , Jinan, Shandong 250061, People's Republic of China.
authors.forename: Song
authors.initials: S
authors.lastname: Qiu
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University , Jinan, Shandong 250061, People's Republic of China.
authors.forename: Hailong
authors.initials: H
authors.lastname: Lyu
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University , Jinan, Shandong 250061, People's Republic of China.
authors.forename: Jiurong
authors.initials: J
authors.lastname: Liu
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University , Jinan, Shandong 250061, People's Republic of China.
authors.forename: Yuzhen
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education and School of Materials Science and Engineering, Shandong University , Jinan, Shandong 250061, People's Republic of China.
authors.forename: Nannan
authors.initials: N
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Crystal Materials, Shandong University , Shandong 250100, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
keywords: dielectric loss; electromagnetic wave absorption; magnetic loss; nickel; porous composite microspheres