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http://dx.doi.org/10.6111/JKCGCT.2010.20.6.283

Preparation of nanosized NiO powders by mixing acid and base nickel salts and their reduction behavior  

Kim, Chang-Sam (Korea Institute of Science and Technology)
Yun, Dong-Hun (Korea Institute of Science and Technology)
Jeon, Sung-Woon (Korea Institute of Science and Technology)
Kwon, Hyok-Bo (Department of Environmental Engineering, Kyungnam university)
Park, Sang-Hwan (Korea Institute of Science and Technology)
Abstract
Nanosized NiO powder was prepared by mixing an acid nickel salt and a base nickel salt and their reduction behavior was studied. Ni formate was employed as an acid salt and nickel hydroxide and basic nickel carbonate as base salts. One equivalent acid salt was mixed with 9 equivalent base salt. The mixture of the formate and the carbonate produced ~100 run spherical NiO powder by heat treatment at $750^{\circ}C$/2 h, but the mixture of the formate and the hydroxide gave rise to ~100 nm pseudo spherical NiO powder by heat treatment at $600^{\circ}C$/2 h and grew fast to give pseudo cubic crystals of 100~600 run by heat treatment at $750^{\circ}C$/2 h. Reduction by hydrogen gas proceeded much faster for the one with the hydroxide than that with the carbonate to give porous body with well grown necks. Their behavior was studied by analysis of TG/DSC, XRD, and SEM.
Keywords
NiO powder; Ni powder; Synthesis; Particle size; Particle shape; Nickel salt;
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Times Cited By KSCI : 3  (Citation Analysis)
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