Obtaining nickel nanoparticles by the gas-phase method - induction flow levitation

In this paper, we consider the possibility of obtaining nickel nanoparticles from a bulk sample by the method of induction flow levitation. This method is based on non-contact heating and holding a metal sample in a state of levitation by a high-frequency electromagnetic field. The generator power was 10 kW and the frequency was 440 kHz. The synthesis took place at a temperature of 1800°C with a feeding rate of 3 g/h. Argon was used as the refrigerant gas, the pressure in the system was maintained at 400 mbar. The resulting nanoparticles were characterized by size using SEM and TEM micrographs, where the average size of the nanoparticles was ~16 nm. XRF and SEM-EDS, the results showed the presence of only metallic nickel and oxygen in the nanoparticles.