PREPARATION OF FIBRIOUS NICKEL OXIDE PARTICLES BY THE METHOD OF CHEMICAL PRECIPITATION AND PYROLYSIS

摘要

The fibrous nickel oxide powder was prepared by the method of chemical precipitation and pyrolysis, that is, the NiO precursor was firstly precipitated from nickel ions solution with addition of oxalate salt and then the final NiO powder was obtained by pyrolysis of the prucursor. The effects of the pH, reaction temperature, reactant concentration, addition of surfactant on the morphology of the precursor particles were investigated. The influences of the various conditions, including the temperature and time, the air flow and the speed of the temperature increase on the morphology, average size and specific surface area of the NiO particles were also addressed. The fibrous NiO particles with 100-120 in axis/diameter ratio and 5.5 m~2/g of the specific surface area may be produced under certain operation conditions by this process.