Preparation and magnetic properties of nano-Ni coated cenosphere composites |
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Authors: | Xian-feng Meng Dong-hong Li Wei Liu |
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Institution: | a School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China b Zhengzhou Research Institute of Chalco, Zhengzhou 450041, China |
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Abstract: | Ni coated cenosphere composites are successfully fabricated by heterogeneous precipitation method using metal salts, ammonium hydro-carbonate and cenospheres as the raw materials. The cenosphere particles are characterized by scanning electron microscope (SEM)/energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and vibrating sample magnetometer (VSM) during and after the coating process. All results show that relatively uniform, smooth and compact Ni layer has been successfully coated onto cenospheres under the given conditions, furthermore, the nanometer Ni crystallite has a face-centered cubic structure. Magnetic property of Ni coated cenosphere composites can be adjusted by controlling the synthesis conditions and content of magnetic metal. The low density Ni coated cenosphere composites may be utilized for electromagnetic wave shielding and microwave absorbing materials. |
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Keywords: | Heterogeneous precipitation Nano-Ni Fly-ash cenosphere Magnetic property |
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