Zirconium is a chemical element whose chemical symbol is Zr, which has an atomic number of 40 and is a high melting point metal that is light gray. The density is 6.49 g/cm 3 . The temperature of 1852 ± 2.001 ° C, the boiling point of 4377 ° C. The valence price is +2, +3 and +4. The first ionization energy is 6.84 eV.
Zirconium readily absorbs hydrogen, nitrogen and oxygen; zirconium has a strong affinity for oxygen, and its solubility in zirconium at 1000 °C can significantly increase its volume.
The surface of zirconium is easy to form an oxide film with a luster, so the appearance is similar to steel. It is corrosion resistant but soluble in hydrofluoric acid and aqua regia. At high temperatures, it reacts with non-metallic elements and many metal elements to form a solid solution. Zirconium has good plasticity and is easy to process into sheets and wires.
Zirconium can absorb a large amount of gases such as oxygen, hydrogen, and nitrogen when heated, and can be used as a hydrogen storage material. Zirconium has better corrosion resistance than titanium and is close to tantalum and niobium. Zirconium and strontium are two metals that are chemically similar and symbiotic together and contain radioactive materials.
Powdered iron is mixed with zirconium nitrate and can be used as a flash powder. Metal zirconium is used almost exclusively as a cladding for uranium fuel components in nuclear reactors. Also used in the manufacture of photographic flashlights, as well as corrosion-resistant containers and pipes, especially resistant to hydrochloric acid and sulfuric acid. Zirconium chemicals can be used as crosslinkers for polymers.
Zirconium powder is often wetted and passivated with not less than 25% water. Store in a cool, ventilated warehouse. Keep away from fire and heat. The package is sealed. Should be stored separately from acids, etc., should not be mixed. Explosion-proof lighting and ventilation facilities are used. It is forbidden to use mechanical equipment and tools that are prone to sparks. The storage area should be provided with suitable materials to contain spills. It should be protected from rain and earthquake during transportation. Be careful when handling, prevent collision and rolling, and prevent mechanical damage.