Difference between high-purity magnesia and magnesia

High-purity magnesia has excellent alkali resistance, electrical insulation and light transmittance at high temperature, and can often be used as high-temperature heat-resistant material. In the field of ceramics, it is used as raw material for transparent ceramic crucibles, substrates, etc. It is used for magnetic device packing, insulating material packing and various carriers in the electrical field. The thermal conductivity of magnesium oxide used as ceramic substrate is more than 2 times higher than that of alumina, and the loss of electrolyte is only 1/10 of that of alumina. It can also be used as raw material for high-purity magnesia and chemically as "analytically pure" magnesium oxide

The chemical molecular formula of high-purity magnesia and magnesium oxide is the same, but high-purity magnesia is the crystallization product of magnesium oxide after sintering at high temperature, while magnesium oxide is amorphous structure, and the fire resistance of the two is greatly different, and the volume stability of high-purity magnesia is higher than that of magnesium oxide. The volume stability of high-purity magnesia at high temperature is also greatly different, and the volume change of high-purity magnesia is small when the temperature changes, while magnesium oxide is easy to crack, and the phenomenon of high-purity magnesia is relatively rare