High-purity magnesium oxide refers to a class of magnesium oxide with a content of MgO of 98 or more, while the activity of magnesium oxide refers to the ability of magnesium oxide to participate in physical or chemical processes, which is essentially the unsaturation of valence bonds on the surface of the daisy crystals, which is exacerbated by the defects and aberrations of the crystal lattice. The difference in activity depends mainly on the size of magnesium oxide daisy crystals, structural incompleteness and other factors.
Under high temperature conditions, high purity magnesium oxide has excellent electric insulation and alkali resistance, and has good light transmittance, often as high temperature heat-resistant materials; as raw materials for high purity electrofused magnesium sand; chemically as “analytically pure” magnesium oxide; used as insulating material filler, magnetic device filler, and a variety of carriers in the electrical field; in the field of ceramics for the manufacture of light transmittance, and in the field of ceramic. In the field of ceramics, it is used as raw material for manufacturing light-transparent ceramic crucible and substrate. Meanwhile, compared with alumina, the thermal conductivity of high purity magnesium oxide used in ceramic substrate is more than 2 times higher, and the loss of electrolyte is only 1/10 of alumina.
What is the difference between high purity magnesium oxide and activated magnesium oxide? In the process of producing high-grade products, it is necessary to add high-purity, low impurity content of magnesium oxide; if it is necessary to improve the reaction speed, it is necessary to add active magnesium oxide. In general, the reaction of activated magnesium oxide is faster.
The application of active magnesium oxide is very popular. Active magnesium oxide is the development of functional inorganic materials in recent years, according to the magnesium oxide activity of high and low, the use is not the same. Activated magnesium oxide can be divided into low activity, activity, high activity magnesium oxide according to the different iodine absorption value.
Low-activity magnesium oxide is mostly used in flue gas desulfurization, acidic wastewater treatment, etc.; medium-activity magnesium oxide is mostly used in neoprene; high-activity magnesium oxide is mainly used in medical butyl rubber stopper. In addition, low activity magnesium oxide is mainly generated by calcining magnesite, while the iodine absorption value reaches more than 120mgl/g of active magnesium oxide usually need to be produced by special process.
