Method for testing particle size distribution of superfine nickel powder

Abstract

The invention provides a method for testing particle size distribution of superfine nickel powder. The method comprises the operation steps as follows: preparing a polyamidoamine solution with the mass-to-volume percent of 0.5-20% with reverse osmosis water; enabling a laser particle size distribution detector to be located in a stable detection state; preparing a superfine nickel powder solution with the mass-to-volume percent of 0.01-1% with the reverse osmosis water, adding the polyamidoamine solution, wherein the adding amount of the polyamidoamine solution to the amount of reverse osmosis water in the superfine nickel power solution is (0.5-2 ml):150 ml; then dispersing the mixture with an ultrasonic stirrer for 15-20 min; detecting the liquid obtained in the last step by the laser particle size distribution detector to obtain the particle size distribution condition of the superfine nickel power. According to the method, the polyamidoamine is selected as a surfactant, so that the superfine nickel powder is good in hydrophilic property, and the actual particle size distribution condition of the superfine nickel power can be reflected more truly.

Description

technical field [0001] The invention relates to the technical field of ultrafine powder, in particular to a method for testing the particle size distribution of ultrafine nickel powder. Background technique [0002] The particle size of powder is the basic property of powder, especially for nano-metal powder, the particle size directly affects the melting temperature, oxidation temperature, fluidity and other properties of the powder, which will further affect the practical application of production. The nickel powder prepared by PVD method belongs to ultrafine nickel powder. Because of its small particle size and large surface area ratio, the ultrafine nickel powder is a magnetic material and is prone to agglomeration. This problem also plagues many manufacturers and powder suppliers. Therefore, the correct, effective and rapid detection of the particle size distribution of the powder can not affect the production of the next process. [0003] When testing the particle siz...

AI Technical Summary

Problems solved by technology

However, using alcohol as a medium, first, it costs a lot, second, it will pollute the environment, and third, because alcohol is a flammable and explosive substance, there is a certain degree of danger.

When pure water is used as the medium, there is a problem of poor hydrophilicity between pure water and nickel powder, especially the smaller the particle size of the powder, the worse the hydrophilicity

Images