Magnesium oxide is an inorganic substance with a chemical formula of MgO, an oxide of magnesium, an ionic compound. Magnesium calcium synthetic sand is a white solid at room temperature. Magnesium oxide exists in nature in the form of periclase is a raw material for magnesium smelting.
Magnesium oxide has high fire resistance insulation properties. It can be converted into crystals after high temperature burning above 1000°C, it will become dead burnt magnesia (also known as magnesia) sintered magnesia at 1500-2000°C.