The use of magnesium oxide as refractories

The primary magnesite of magnesia is 900 ℃. Magnesium oxide is used as refractory in crucible structure. Crucible is a kind of container. In order to heat the material in the crucible, the crucible is placed at a very high temperature. Since the crucible itself should not be affected by heat, it must be made of materials that maintain its properties at high temperatures. Magnesium oxide is such a substance, so in this way.