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Application of nano-magnesium oxide in many fields

wallpapers News 2021-04-02
Nano-magnesium oxide is a new type of high-functional fine inorganic material, the main types are nano-powder, nano-film, nano-wire, and nano-solid. Due to the particularity of its structure, it has different electrical, magnetic, thermal, and optical properties from the body, thus opening up a series of new application areas.
1. Application in sterilization materials
Nano-magnesium oxide is positively charged due to its high specific surface area and many lattice defects. After adsorbing halogen gas, it can form a strong effect with negatively charged Escherichia coli and spores, thereby exhibiting a strong effect on bacteria, spores, and viruses. High killing ability. Compared with silver oxide and solid bactericides containing silver, copper, and other metal elements, nano-magnesium oxide has the advantages of abundant raw materials, simple sterilization conditions, an odorless and tasteless.
Magnesium oxide of 4-10nm has an exceptionally outstanding killing effect on a variety of viruses, bacteria, and fungi (within 20min, the killing effect of bacteria is 100%), far better than the usual silver-based fungicides (within 60min, bacteria The killing effect is 100%); and nano-magnesium oxide has a huge adsorption capacity for chlorine, which can absorb 20% of its own weight, further strengthening the sterilization effect.
2. Application in nanophase ceramics
Nano-magnesium oxide can be used as a sintering aid in ceramics. Nano-ceramics are made of non-agglomerated nano-powder titanium oxide, aluminum oxide, etc. through static sintering or stress-assisted sintering. However, due to the high surface energy, high surface activity, and high grain boundary energy of the nanopowder, it provides a higher driving force for the growth of crystals and also causes a decrease in the bonding strength of the grain boundary. Nano-magnesium oxide is used as sintering of nanophase ceramics. Additives can effectively solve this problem. The nano-zirconia powder was mixed with 5% nano-magnesium oxide, and a high-density ceramic was successfully made by stress-free sintering.
3. Application in the steelmaking industry
Nano-magnesium oxide is used in the steelmaking industry and can be used as an annealing separator for silicon steel plates. When silicon steel sheet is annealed at high temperature, the performance of magnesium oxide for coating silicon steel sheet is directly related to the quality of the magnesium silicate insulating film formed on the surface of the silicon steel sheet. However, the factors affecting this performance are rarely reported in the literature so far. Belongs to national patents. X-ray diffraction analysis of magnesium oxide used for coating of foreign silicon steel plate found that the average particle size of magnesium oxide used is 40-65nm, which belongs to the category of nano-powder.
4. Application in catalyst
Nano-magnesium oxide crystals are used as catalysts for alkyl chlorination, which can absorb Cl2-magnesium oxide adducts formed by a large amount of chlorine gas. On the magnesium oxide nano-crystals, because chlorine atoms share the electron cloud density with the surface O2--anions, when chlorine gas decomposes During chemical adsorption, chloride-like ions are embedded, so the chemical reactivity of Cl2-magnesium oxide adducts is closer to chloride ions than chlorine, and the selectivity of Cl2-magnesium oxide adducts is higher than that of chlorine atoms. Using a certain pre-treated nano-magnesium oxide as a catalyst can increase the yield of the product in the process of preparing acetone phthalate by the catalytic synthesis method from 80% to 95%. Nano-magnesium oxide also has high catalytic activity for the polymerization of bismaleimide (BMI).
Nano-magnesium oxide also has an excellent ability to shield ultraviolet rays and is the preferred material for the development of functional cosmetics, fibers, and clothes. In addition, nano-magnesium oxide compounded with high polymers or other materials has a good microwave absorption coefficient. It can not only be used as a filling material for cosmetics, fragrance powder, and paint, but also as a filling material for rubber, a lipolytic agent, or a pharmaceutical product. Polishing agent, etc.
In addition, nano-magnesium oxide as a wide bandgap insulating material also has a very high secondary electron emission rate and has very important applications in precision optical components and semiconductor substrate materials.

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