Hebei Messi Biology Co., Ltd. stated that nano magnesium oxide is a new type of high-function fine inorganic material, the main types of which are nano powder, nano film, nano wire and nano solid. Due to the particularity of its structure, it has electrical, magnetic, thermal and optical properties different from the original, thus opening up a series of new application fields.
1. Application in sterilization materials
Nano magnesium oxide has a high specific surface area and many lattice defects, which are positively charged. After adsorbing halogen gas, it can form a strong effect with negatively charged Escherichia coli and spores, thereby showing a high killing ability against bacteria, spores and viruses. Compared with solid bactericides containing silver oxide and other metal elements such as silver and copper, nano magnesium oxide has the advantages of rich raw materials, simple sterilization conditions, and no odor and taste.
4-10nm magnesium oxide has an exceptionally outstanding killing effect on a variety of viruses, bacteria and fungi (within 20 minutes, the killing effect of bacteria is 100%), which is far better than the usual silver-based bactericide (within 60 minutes, the killing effect of bacteria is 100%); and nano magnesium oxide has a huge adsorption capacity for chlorine, which can adsorb 20% of its own weight of chlorine, further enhancing the bactericidal effect.
2. Application in nanophase ceramics
Nano magnesium oxide can be used as a sintering aid in ceramics. Nanoceramics are made of non-agglomerated nanopowders such as titanium oxide and aluminum oxide through static sintering or stress-assisted sintering. However, due to the high surface energy, high surface activity and high grain boundary energy of nanopowders, which provide a higher driving force for the growth of crystals, it also causes the grain boundary bonding strength to decrease. Nano magnesium oxide, as a sintering aid for nanophase ceramics, can effectively solve this problem. 5% nano magnesium oxide was added to nano zirconium oxide powder, and high-density ceramics were successfully made through stress-free sintering.
3. Application in steelmaking industry
Nano magnesium oxide is used in steelmaking industry and can be used as an annealing isolation agent for silicon steel sheets. When silicon steel sheets are annealed at high temperatures, the performance of magnesium oxide used in silicon steel sheet coating is directly related to the quality of the magnesium silicate insulating film generated on the surface of the silicon steel sheet. X-ray diffraction analysis of magnesium oxide used in foreign silicon steel sheet coatings found that the average particle size of magnesium oxide used was 40-65nm, which belongs to the category of nano powders.
4. Application in catalysts
As a catalyst for alkyl chlorination, nano magnesium oxide crystals can adsorb a large amount of Cl2-magnesium oxide adducts formed by chlorine. On magnesium oxide nanocrystals, since chlorine atoms share electron cloud density with surface O2– anions, when chlorine undergoes dissociative chemical adsorption, chlorine-like ions are embedded. Therefore, the chemical reactivity of Cl2-magnesium oxide adducts is closer to chloride ions than chlorine gas, and the selectivity of Cl2-magnesium oxide adducts is higher than that of chlorine atoms. Using nano magnesium oxide that has been pretreated as a catalyst can increase the yield of the product of the catalytic synthesis of acetyl acetone from 80% to 95%. Nano magnesium oxide also has a high catalytic activity for the polymerization of bismaleimide (BMI).
Nano magnesium oxide also has excellent ultraviolet shielding ability and is a preferred material for the development of functional cosmetics, fibers and clothing. In addition, nano magnesium oxide has a good microwave absorption coefficient when combined with polymers or other materials. It can not only be used as a filling material for cosmetics, perfume powder, and paint, but also as a filling material for rubber, a fat decomposing agent or a polishing agent for pharmaceuticals.
In addition, nano magnesium oxide, as a wide bandgap insulating material, also has an extremely high secondary electron emission rate, and has very important applications in precision optical components and semiconductor substrate materials.