Application in the process of silicon powder processing enterprises
Matched with the explosion of polysilicon output together with the production of by-products "metal silicon powder" is also glowing and heating, metal silicon powder processing enterprises for the development of other fields have also shown its advantages.
However, it is only in some polysilicon production where the powders are needed, such as in fluidized bed polysilicon production. Is currently one of the main process of preparation of polysilicon fluidized bed method, it is the silane or chlorosilane as silicon source, the hydrogen as carrier gas, applying silane into the fluidized bed and the fluidized bed is polycrystalline silicon as the seed of fluidized particle, the silane pyrolysis and deposition in the seed, and granular polysilicon have been obtained.
In the process of chemical reaction, silane gas will be immediately decomposed, and part of it will undergo homogeneous reaction to generate gas phase micronucleus. After a series of polymerization and growth processes, the micronucleus will generate metallic silicon powder. During this polymerization process, a certain proportion of the micronucleus will adhere to the surface of silicon particles and become a part of granular silicon products. The other part is deposited on the surface of silicon particles through heterogeneous reaction.
But metal processing enterprises processing of silicon metal powder "is not our life often mentioned that" silicon powder ", in fact, the difference is very big, generally speaking, we usually say the scientific names of silicon powder silica fume, is in the process of industrial furnace in high temperature melting, along with the exhaust gas to escape, because of their granularity is very small, so called silicon powder. And crystalline silicon (Si) is the main component of metal silicon powder, its chemical composition with silicon powder is very different, the price is not silicon powder energy ratio.
Metal silicon powder processing enterprises processed metal silicon powder has a very wide range of uses, can be used in the manufacture of organic silicon polymer materials, monocrystalline silicon, metallurgy casting, smelting, chemical products, refractory materials, aluminum and aluminum alloy and other products. Due to the size effect, silicon powders will be endowed with new properties when they are transformed to nanoscale, which makes them have broad potential application prospects in the fields of ceramics, composites, catalytic materials, photocells and biomaterials.
Silicon metal powder is just a by-product, but fortunately the brilliance of silicon metal powder is not covered by the main product particles of silicon produced in the production process, compared to other by-products, silicon metal powder can also have a wide range of uses, can really be very lucky.
