Magnesium oxide has high fire resistance and insulation properties. After high-temperature ignition above 1000 ℃, it can be transformed into crystals, and when it reaches 1500-2000 ° C, it becomes dead burned magnesium oxide (magnesia) or sintered magnesium oxide.

Application field: High purity magnesium oxide has excellent alkali resistance and electrical insulation at high temperatures. High thermal expansion coefficient and thermal conductivity have good light transmittance. Widely used as high-temperature and heat-resistant materials. In the field of ceramics, it is used as a raw material for transparent ceramic crucibles, substrates, etc. It is used in electrical materials, magnetic device fillers, insulation material fillers, and various carriers in the electrical field.