Zirconium

Mô tả

zirconium (Zirconium) is a chemical element, its chemical symbol is Zr, its atomic number is 40, is one of the high melting point metal of a silver-white, pale gray. A density of 6.49 g / cm 3. The melting point of 1852 ± 2 ℃, boiling point 4377 ° C. Valence +2, +3 and +4. The first ionization energy of 6.84 electron volts. The surface is easy to form a layer of the zirconium oxide film, and has a gloss, so similar to the appearance and steel. In corrosion resistance, can be dissolved in hydrofluoric acid and aqua regia; high temperatures, can be used with non-metallic elements and many metal elements reaction, to generate a solid solution compound. Used in the nuclear industry and the chemical materials used as corrosion resistance in high temperature and high pressure.

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