Abstract
The preparation of nickel particles from nickel ammine complex was studied by ultrasonic spray pyrolysis in the presence and the absence of hydrogen. In the presence of H2 (about 9 vol.%), nickel particles were formed at 500 °C, which is much lower than that reported. Metallic nickel, together with NiO, was obtained as a major phase at 400 °C. In the absence of H2, metallic Ni was also obtained, but higher temperature (e.g. 900 °C) was needed. It is suggested that the addition of NH3·H2O and NH4HCO3 to NiCl2·6H2O precursor changes the reaction pathway of Ni formation. By careful control, spherical, solid and well-distributed Ni particles of about 0.5 μm were obtained at a residence time of 7–9 s in the aerosol reactor.
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Xia, B., Lenggoro, I.W. & Okuyama, K. Preparation of Ni particles by ultrasonic spray pyrolysis of NiCl2·6H2O precursor containing ammonia. Journal of Materials Science 36, 1701–1705 (2001). https://doi.org/10.1023/A:1017560206321
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DOI: https://doi.org/10.1023/A:1017560206321