Preparation Of Flaky Nickel Powder In The High-energy Ball Milling Process And Surface Modification

Metal powder material is of great significance to promote the nonferrous metals industry and chemical industry to upgrade its technology and promote the optimization of the industrial structure. Flake nickel powder is a bright, shiny particles products, is applicable to high-performance coatings and powder coatings ideal decorative paint. Nickel-based electromagnetic shielding paint-ray absorption and scattering of electronic vector capability and the decay of magnetic vector magnitude, in the use of EM source, the coating can be effectively shielding EM ray. Nickel oxide after special treatment has good oxidation resistance, chemical resistance and anti-corrosion humid environment, Stability can meet the application requirements. so, the nickel paint with electromagnetic resistance is accounted the mainstream in European countries and the United States in the electromagnetic shielding materials. Flake nickel powder surface modification of the application before the important part. In this paper, through the experiments of the ball material than 20:1, the volume of solvent ethanol, D program aids volume, Grinding time 4-6 hours and rotate speed:400 r/min. under such conditions can produce the best results flake nickel powder, parameters:nickel powder parameter: D10:2.68μm,D50:11.19μm, D90:29.78μm, loose-packed density:0.25g/cm3; Several common with the surface modifier, as well as several compound modifier to flake nickel powder surface modification, It identified several common surface modifier and several compound modifier to flake nickel powder on the surface properties of:Modification of a single pharmaceutical result is not good, the right particle size changed greatly, particle size increased 100% to 200%; in a decentralized performance improvement can only make a relatively limited area is scattered 600-800cm3/g (wet); F program suit flake nickel powder surface modification, F program can maintain changes in the size of the 50% below the dispersion effect can reach 1,000 cm3/g (wet), show good overall performance.