Zirconium is a metallic element, symbol Zr, in group IV-B of the periodic table with atomic number 40, density 6.49g/cm³, melting point 1852°C, boiling point 4377°C. Zirconium is a silver-white transition metal, because of its complex production process, not easy to be extracted, so it is often called “rare metal”. In fact, the amount of zirconium in the Earth’s crust is about 0.025%, ranking 19th, almost equal to chromium, and more than the common metals copper, lead, nickel, and zinc, but the distribution is very dispersed. Zirconium is easy to form an oxide film on the surface in the air, which has a luster and similar appearance to steel. Zirconium is corrosion resistant, but soluble in hydrofluoric acid and aqua regia; At high temperatures, it can react with many elements to generate solid solution compounds, and the corrosion resistance of zirconium is better than that of titanium, which is close to tantalum niobium. In view of its good plasticity, zirconium is often processed into plates, wires, etc. Zirconium can absorb a large amount of oxygen, hydrogen, nitrogen and other gases when heated, and can be used as hydrogen storage materials. As a relatively scarce resource, zirconium is widely used in the fields of electronics, ceramics, glass, petrochemicals, building materials, medicine, textiles and daily necessities.