2017 年 50 巻 7 号 p. 511-515
We studied the deposition of non-aggregated nickel nanoparticles formed by hydrogen reduction of nickel chloride onto silica microparticles in a tubular furnace reactor for catalysts. To produce the non-aggregated nickel nanoparticles, rapid cooling with a Laval nozzle was applied to nickel particles. The diameter of the particles could be controlled by the concentration of NiCl2 vapor and the flow rate of carrier gas N2 for NiCl2 vapor. Furthermore, we developed a technique for preventing the sintering of nickel nanoparticles by depositing nickel particles onto silica particles with surfaces softened by high temperatures.