Where is the good Silicon Powder

Where is the good Silicon Powder? Silicon Powder may be unfamiliar to a lot of people, and here's the introduction to it:

Silicon powder, also called micro silicon powder, scientific name "silica fume, also known as silica fume, is an industrial electric furnace in the process of high temperature silicon and ferrosilicon smelting industry, along with the waste gas emitted by special capture device to collect smoke. The scientific name "si grey", microbe or the "Fume", is the industrial electric furnace in the process of high temperature melting industrial silicon and silicon iron, with the exhaust gas escape from the dust collection and treatment of special collection device. In the smoke and dust of escaping, SiO2 content is about 90% of the total amount of soot, the particle degree is very small, the average particle size is almost nano-scale, so it is called silica powder.