Is Metallic Silicon Powder Useful?
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Is metal silicon powder useful?
Since the industrial revolution, the consumption of traditional energy has increased dramatically and the ecological environment has continued to deteriorate. Therefore, the photovoltaic industry, as a representative of renewable energy, has quickly become the focus of people's attention, directly driving the rapid growth of polysilicon demand. However, behind the rapid growth of polysilicon production, the byproduct "metal silicon powder" produced with it is also shining quietly, showing its unique advantages in other fields.
Is metal silicon powder useful? However, only some polysilicon production occasions will produce metal silicon powder byproducts, such as the fluidized bed method. The fluidized bed method is one of the main methods for preparing polysilicon at present. It uses silane or chlorosilane as silicon source gas and hydrogen as carrier gas. Silane is introduced into the fluidized bed with polysilicon seed crystals as fluidized particles, so that the silane is cracked and deposited on the seed crystals to obtain granular polysilicon.
Is metal silicon powder useful? During the reaction, silane gas enters the fluidized bed and quickly decomposes. A part of it undergoes a heterogeneous reaction and is deposited on the surface of silicon particles. The other part undergoes a homogeneous reaction to produce gas-phase micronuclei. The micronuclei undergo a series of polymerization and growth processes to produce metal silicon powder. In this polymerization process, a certain proportion of micronuclei adhere to the surface of silicon particles and become part of the granular silicon product.
Is metal silicon powder useful? Generally speaking, the silicon powder we usually refer to is actually microsilicon powder, the scientific name is "silicon ash". It is the smoke that escapes with the exhaust gas during the high-temperature smelting of industrial silicon and ferrosilicon in industrial electric furnaces, and is collected and processed by a special capture device. Because the content of silicon dioxide accounts for about 90% of the total smoke, and the particle size is very small, it is called silicon powder. However, the main component of metal silicon powder is crystalline silicon (Si), the chemical composition varies greatly, and the price is higher than silicon powder.
Is metal silicon powder useful? Metal silicon powder has a wide range of uses and can be used to manufacture organic silicon polymer materials, single crystal silicon, metallurgical casting, smelting, chemical products, refractory materials, aluminum and aluminum alloys. Especially in the process of transition to nanoscale, due to the size effect, silicon will be given new properties, which will give it great potential application prospects in ceramic materials, composite materials, catalytic materials, photovoltaic cells, biomaterials, etc.
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