Zirconium dioxide, whose chemical formula is ZrO2, is the main oxide of zirconium. Under normal conditions, it is a white, odorless and tasteless crystal, and it is insoluble in water, hydrochloric acid and dilute sulfuric acid. The chemical properties are inactive, and it has the properties of high melting point, high resistivity, high refractive index and low thermal expansion coefficient, making it an important high temperature resistant material, ceramic insulating material and ceramic sunscreen, and it is also the main raw material for artificial drills