Metallic silicon is a common metallurgical raw material with good high temperature resistance and good performance in the manufacturing of semiconductor components. Metal silicon powder is a powdery material processed from metal silicon. The quality of metal silicon powder obtained by different production processes is also different. In addition to metallic silicon powder, there are also some other products in the production of metallic silicon powder. Which method to adopt depends on the actual situation. So what are the production processes of metal silicon powder?
The preparation method of metallic silicon powder is relatively simple and easy, and the preparation principle is also very simple and easy to understand. After a certain amount of coarse silicon powder is dispersed, it is fed into the plasma arc with inert gas and heated instantly, so that the coarse silicon powder instantly evaporates into silicon vapor at a higher temperature, and then the silicon vapor enters the cooling zone and condenses into nano-scale metallic silicon. pink.
Ball milling method: Using the huge friction force generated by mechanical rotation and interaction between particles, large-sized silicon materials are ground into nanoscale powder. The metal silicon powder produced by the ball milling method has high impurity content, the particle size distribution cannot be well controlled, and the post-processing is cumbersome.
Chemical vapor deposition method: under the action of external energy such as heat, microwave, laser, plasma, etc. Silane decomposes into silicon and hydrogen under high hydrogen dilution conditions and rapidly condenses in a gas phase environment to prepare nanosilica powder.
