Anti-oxidation method for water classification treatment of metal nickel powder

Abstract

The invention discloses an antioxidant method for grading treatment of metal nickel powder by water. The method comprises the following steps of adding an antioxidant TX-02 into deionized water, stirring until the antioxidant is completely dissolved to prepare corrosion inhibition solution in which the antioxidant TX-02 accounts for 0.1 to 2 mass percent, and controlling that the pH of the corrosion inhibition solution ranges from 7 to 8, wherein the antioxidant TX-02 is prepared by uniformly mixing carbohydrazide and citric acid in a weight ratio of 1-3:1; adding metal nickel powder which is not graded into emulsifying equipment containing the corrosion inhibition solution with the mass concentration of 0.1-2 percent prepared in the step (1) to prepare nickel powder slurry of which the solid content is 10 to 25 percent; starting the emulsifying equipment, emulsifying the nickel powder slurry for 20 to 50 minutes and dispersing metal nickel powder into slurry with uniformly distributed particles; filtering the emulsified nickel powder slurry, and grading in a grading system. The method has the advantage that metal powder is difficulty corroded and oxidized in the water grading process.

Description

Technical field: [0001] The invention relates to the technical field of water classification anti-oxidation of metal powder, in particular to an anti-oxidation method for water classification treatment of metal nickel powder. Background technique: [0002] The submicron metal nickel powder produced by PVD method has uneven particle size and cannot be directly used in the MLCC industry. It needs to be classified to obtain powder with uniform particle size distribution. In the known submicron metal nickel powder classification process, in the liquid phase classification method, alcohols are mostly used as the medium, and commonly used solvent media include ethanol, propanol and other alcohols. For example, compared with other organic solvents, ethanol has lighter specific gravity, lower viscosity, better classification efficiency and easy access to raw materials. During the grading process, the powder surface area and oxygen content change little, and the performance is stabl...

AI Technical Summary

Problems solved by technology

The surface of the nickel powder is uneven, and the friction between the particles is large, which leads to the increase of the viscosity of the nickel powder during the pulping process, which affects the pulping production