Laser evaporation multi-cavity metal/carbon nanometer powder continuous production method

Abstract

The invention relates to the technical field of nanometer powder production, in particular to a laser evaporation multi-cavity metal / carbon nanometer powder continuous production method. By utilizinga laser evaporation multi-cavity nanometer powder preparation device, the laser power is increased to the target melting power; the evaporation efficiency of an anode is changed by controlling the laser power; and temperature gradients in cavities are controlled, so that nanometer powder with different particle sizes is formed, and continuous production can be realized. According to the productionmethod, simultaneous preparation of multiple kinds of powder with different components can be realized, the mutual pollution in the preparation process of the powder is avoided, the purity of the powder is improved, the production efficiency is greatly improved, and the cost is reduced; and the production effects that the different cavities are continuously switched, and the nanometer powder canbe continuously evaporated can be achieved in industry, and the continuous production can be realized on the premise that a vacuum system meets the continuous work.

Description

technical field [0001] The invention relates to the technical field of nano-powder production, in particular to a continuous production method for metal / carbon nano-powder. Background technique [0002] DC arc plasma is an effective heat source for preparing nanoparticles, especially "core / shell" metal (alloy) nanocomposite particles, carbon-related materials and ceramic nanomaterials. At present, this method has initially achieved mass production, such as Chinese patent application: A multi-source direct current arc automatic nano-powder production system and method (201410189518.4), but for large-scale industrial production, there are still many technical problems, mainly in how to achieve high efficiency, low cost, high purity, no Pollution and continuous preparation of nanopowders. [0003] The existing nano-powder preparation equipment and process are mainly aimed at the generation, classification, capture and treatment of nano-powder in a single chamber, that is, a si...

AI Technical Summary

Problems solved by technology

[0005] At present, in the single-chamber powder preparation equipment and process, most of the time is spent on vacuuming and vacuum maintenance during the cycle of vacuum extraction, powder generation and processing, and vacuum maintenance. The time for this vacuum extraction and vacuum maintenance accounts for 50%-70%, while the actual powder production time is 15-20%. Overall, the production efficiency is low, and at the same time due to the vacuum extraction and vacuum maintenance and repeated repetitions The process will consume a lot of energy, which will greatly increase the cost

[0006] 2. Low purity and cross-contamination

[0007] Single-chamber powder preparation equipment and technology, after the preparation of nano-powder of one material, if the powder of other materials is prepared, there will be at least two types of powders that will contaminate each other, thereby reducing the risk of nano-powder the purity of

[0008] 3. Unable to realize continuous production in the true sense

[0009] Although the current single-chamber powder preparation equipment and process can achieve a certain degree of continuous production through the continuous feeding and supply of anode materials, it is limited by the size of the anode materials, and the material will be continuously fed and supplied during the process. There is a problem of insufficient continuity. At the same time, due to the impact of continuous feeding on the vacuum of the cavity, this method cannot achieve continuous production on the premise of ensuring product quality in large-scale industrial production, and it will be phased out in the near future.