Nano-magnesium oxide is a new type of high-function fine inorganic material. Nano-magnesium oxide is widely used in electronics, catalysis, ceramics, oil products, coatings and other fields. Flame retardants for chemical fiber and plastic industries; medium and high temperature dewatering agents for silicon steel sheet production, advanced ceramic materials, electronic industry materials, binders and additives in chemical raw materials; radio industry high-frequency magnetic rod antennas, magnetic device fillers, insulating materials Filling and various carriers; refractory fibers and refractory materials, magnesia-chrome bricks, fillers for heat-resistant coatings, high temperature resistance, insulation resistance instruments, electricity, cables, optical materials and steelmaking; electrical insulator materials, manufacturing crucibles, furnaces, insulating conduits (tubular components), electrode rods, electrode sheets.
At present, the methods for preparing nano-magnesia mainly include gas-phase method, liquid-phase method and solid-phase method. The gas phase method is to use magnesium vapor and oxygen for gas phase reaction to produce rectangular or cubic nanocrystalline magnesium oxide; the liquid phase method is to select one or more suitable soluble metal salts, and prepare the solution according to the prepared material composition. Make each element in an ion or molecular state, and then select a suitable precipitant or use evaporation, sublimation, hydrolysis, etc. to uniformly precipitate or crystallize the metal ions, and finally dehydrate or heat the precipitate or crystal to obtain the required Material powder; solid-phase method can be divided into mechanical pulverization method and solid-phase reaction method according to its processing characteristics. The mechanical pulverization method is to use a crusher to directly grind the raw materials into ultra-fine powder. The solid-phase reaction method is to…
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