Preparation and Magnetic Property of Carbon Nanotube/NiZnCo Ferrite Composite

Abstract:

Precipitation hydrothermal method was used to synthesis carbon nanotubes (CNTs) /Ni_0.5Zn_0.45Co_0.05Fe₂O₄ composites, and then 1wt%CNTs/Ni_0.5Zn_0.45Co_0.05Fe₂O₄ ceramics were fabricated by spark plasma sintering (SPS) technique. The phase, microstructure and magnetic properties of 1wt%CNTs/Ni_0.5Zn_0.45Co_0.05Fe₂O₄ were investigated. The results show that, the substitution of zinc ions by cobalt didn’t change the spinel phase of Ni-Zn ferrite. In the SPS process, CNTs promoted the sintering kinetics, and the liquid state of Ni can act as sintering aid to accelerate the grain boundary extension. After sintered by SPS at 750 °C for 5min, the density of the bulk is about 5.2g/cm³, the grain size increased to 91nm, and the saturation magnetization of the 1wt%CNTs/Ni_0.5Zn_0.45Co_0.05Fe₂O₄ composite ceramics reached at 79.7emu/g.

• Periodical: Advanced Materials Research (Volume 833)
• Pages: 286-290
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.833.286
• Online since: November 2013
• Authors: Xiao Bing Zhou, Hui Feng Cheng, Jun Ping Wang, Jin Lei, Tong Ming Huang, Wei Ming Pan, Qing Huang
• Keywords: Carbon Nanotube (CN), Ferrite, Magnetic Property, Spark Plasma Sintering (SPS)

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