Why nano-silicon powder can be used as raw material for organosilicon polymer materials?
Views : 82
Author : Lzh
Update time : 2023-02-05 13:21:44
What is nano-silicon powder? Nano-siliconis composed of pure amorphous nano-silicon dioxide, with a particle diameter of less than 5 nm and a narrow particle range. Nano-silicon powder is a new generation of photoelectric semiconductor material, a wide gap energy semiconductor, and a high-power light source material. Nano-silicon particles have a large specific surface, are colorless and transparent, have low viscosity, have strong permeability, and have good dispersion. Nano-silicon dioxide particles are of nanometer level, and their particle size is less than the length of a visible light wave; it will not reflect and refract the visible light, so it will not make the paint surface dull.
Preparation of nano-silicon powder Self-propagating method, also known as the combustion method, is essentially to provide the energy required by the whole reaction system by using the heat release of the reaction itself. Self-propagating reaction is initiated at a certain temperature, and the reaction can be continued without providing an external heat source. However, the internal reaction temperature after initiation will lose artificial controllability. Take the preparation of nano-silicon powder with SiO2 as raw material by the self-propagating method as an example. First, nano-silica or SiO2 coating can be prepared by "St ö ber method" smelting. Then SiO2 and some chemically active metals (such as magnesium) can undergo a self-propagating reaction to produce a nano-silica powder. The essence of the reaction is that the highly reducing magnesium takes away the oxygen in SiO2 and forms simple silicon. The synthesis and reduction of the intermediate product SiO2 can also be carried out simultaneously. However, the magnesium thermal reaction emits a lot of heat. Once the reaction is initiated, The local temperature can reach more than 1500 ° C. It is very easy to form SiC under the coexistence of Si and C, and the impurity of SiC will be difficult to remove. The unreacted SiO2 impurity must be removed by hydrofluoric acid with strong corrosivity. The difficult impurity removal task hinders the industrial application of the self-propagation method. In addition, according to the current data, SiO2 can only be reduced by magnesium powder. The actual temperature in the reaction is very high, and a large amount of magnesium powder must be used in a single large-scale production; this may cause an explosion. The preparation of nano-silicon powder by the self-propagating method is still at the laboratory research stage, and it is expected that magnesium powder will be used as an alternative reductant to solve the problems above.
Application of nano-silicon powder In the field of concrete and refractory materials, silica fume is added into special refractory materials to form a multi-layer protective layer in oxidation, which has good mechanical properties, high-temperature resistance, and oxidation resistance. After adding ultrafine silica fume into special refractory materials, its fluidity, sintering property, binding property, and filling porosity properties are improved to varying degrees. It improves the structure density and strength, reduces the wear rate of materials, and enhances corrosion resistance.
Price of nano-silicon powder Nano-silicon powder particle size and purity will affect the product's price, and the purchase volume can also affect the cost of nano-silicon powder. A large amount of large amount will be lower. The price of nano-silicon powder can be found on our company's official website.
Nano-silicon powder supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including nano-silicon powder, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective nano-silicon powder, you are welcome tocontact usor inquire at any time.
