Overview
Zirconium is a transition metal with the atomic number 40 and symbol Zr. It was discovered in 1789 by Martin Heinrich Klaproth and is primarily extracted from the mineral zircon. Zirconium is known for its exceptional resistance to corrosion, even in harsh environments, making it a valuable material in various industrial applications. Its low neutron absorption cross-section makes it particularly useful in nuclear reactors, where it is used as cladding for fuel rods. Additionally, zirconium's biocompatibility has led to its use in medical implants, such as dental and orthopedic devices.
Physical and Chemical Properties
Zirconium is a lustrous, gray-white metal that is solid at room temperature. It has a high melting point of 1855 °C and a boiling point of 4409 °C, making it suitable for high-temperature applications. The metal is highly resistant to corrosion by acids, alkalis, and seawater, owing to the formation of a protective oxide layer. Zirconium is also known for its low thermal neutron absorption cross-section, which is critical for its use in nuclear reactors. It is ductile and malleable, allowing it to be fabricated into various forms, including sheets, rods, and wires.
Main Applications
Zirconium is widely used in the nuclear industry, where it serves as cladding material for fuel rods due to its low neutron absorption and high corrosion resistance. It is also employed in chemical processing equipment, such as heat exchangers and reactors, where its resistance to corrosive environments is essential. In the aerospace industry, zirconium is used in components that require high strength and resistance to extreme temperatures. Medical applications include dental implants and prosthetic devices, where its biocompatibility and corrosion resistance are advantageous. Additionally, zirconium compounds are used in ceramics, abrasives, and refractory materials.
Safety and Storage
Zirconium metal is generally stable, but its powder form can be flammable and explosive when exposed to air. Proper handling procedures, including the use of protective equipment and ventilation, are essential to prevent accidents. Storage should be in a cool, dry place, away from strong oxidizing agents. In case of fire involving zirconium powder, standard extinguishing methods like water or carbon dioxide are ineffective; instead, dry sand or specialized extinguishing agents should be used. Always consult material safety data sheets (MSDS) for detailed safety guidelines.
B2B Procurement Guide
When procuring zirconium, it is crucial to specify the required purity level, as this affects performance in critical applications like nuclear reactors. Suppliers should provide material certification and detailed specifications, including trace element analysis. Consider the form of zirconium needed—whether powder, rods, or sheets—and verify the supplier's ability to meet your fabrication requirements. Price can vary significantly based on purity and form, so obtaining multiple quotes and evaluating supplier reliability is recommended. Long-term contracts may offer cost advantages for bulk purchases.