Chemical Synthesis and Characterization of Nickel Powder

Abstract

The synthesis of magnetic Ni nanoparticles is being investigated by the reduction of NiO nanoparticles in the presence of hydrogen gas. In this study, nanocrystalline NiO particles have been synthesized by a homogenous carbonate precipitation method employing nickel electrolyte (NiSO 4 ) as the source of nickel and ammonium hydrogen carbonate as the precipitating agent. Nickel electrolyte (NiSO 4 ) was obtained after processing of sea nodules by the roastingammonia leaching-solvent extraction method. The physicochemical characterization of NiO and Ni particles, i.e., bright field image by transmission electron microscope, X-ray diffraction, scanning electron microscope, energy dispersive X-ray analysis, Fourier transform-infrared (FT-IR) study, and magnetic measurements by vibration sample magnetometer (VSM) are studied. The particles are observed to be superparamagnetic.

Definition of synthesis parameters of ultrafine nickel powder by direct electrolysis for application in superalloy production

“…Many methods for the preparation of ultrafine nickel powder have been developed [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40]. In [26], the evaporation-condensation method is proposed, however, this method requires special equipment and the process must be conducted under inert atmosphere.…”

“…In this case, the nickel powder would be contaminated with volatile titanium compounds. One of the most common methods for the preparation of nickel powder is reduction with hydrogen from salts [35], and also oxides [36]. The prepared nickel powder is susceptible to grinding, doesn't contain any impurities, however, the production requires a hydrogen station and heating.…”

Synthesis of Magnetic Nanoparticles Incorporated Smart Gel

“…In the present work, the existence of the hysteresis loop confirms the typical ferromagnetic action of the Ni NPs in the polymer matrix. 39 The saturation magnetization (M s ) and the remanence magnetization values (M r ) of the PVA-PMAA/Ni-NCG were 1.93 emu/g and 0.50 emu/g, respectively. The ratio of M r /M s is an important parameter in terms of magnetism.…”