Research on ball milling process of Mn powder for ceramic metal welding

Abstract

The main content of this experiment is to study the optimal ball milling process of Mn powder by controlling the factors such as ball milling ratio, ball milling time and grinding ball size. In the experiment, the Mn powder was ground by wet ball milling method. Ethanol was used as the medium to set different powder: ball: ethanol ratio. The microstructures of Mn were studied by grinding for 6 h, 18 h and 24 h at 400 r/min. The XRD, Scanning Electron Microscope and particle size analyzer were used to analyze the phase, microstructure and particle size of the powder. The results show that the ratio of the crushing rate of material to the time of ball milling are not related. In the initial stage of ball milling, Mn powder was rapidly crushed and refined, but the particle size gradually stabilized after 18 hours. The grinding ball with smaller diameter is slower to crush, but the particle size of Mn powder is more uniform. When the quality of powder: ball: ethanol =1:1.5:1.5, the obtained Mn powder has the finest particle size and uniform particles, which is the best grinding condition. After ball milling, the average particle size of Mn powder is 2.04 μm.