Zirconium oxide

Zirconium Oxide

Zirconium oxide, also known as zirconia, is a white crystalline oxide of zirconium. It is used in the production of ceramics, in the manufacture of abrasives, and as a refractory material due to its high heat resistance.

Chemical Properties

Zirconium oxide is a non-toxic and odorless white powder. It is insoluble in water, but soluble in most acids. The chemical formula for zirconium oxide is ZrO2. It has a high melting point of 2715 degrees Celsius and a boiling point of 4300 degrees Celsius.

Production

Zirconium oxide is produced from the mineral zircon, a silicate of zirconium. The zircon is heated in the presence of air to produce zirconium oxide and silicon dioxide. The zirconium oxide is then separated from the silicon dioxide by a process known as fractional crystallization.

Uses

Zirconium oxide is used in a variety of applications due to its unique properties. It is used in the production of ceramics due to its high heat resistance and hardness. It is also used as an abrasive in the manufacture of grinding wheels and sandpaper. In addition, zirconium oxide is used as a refractory material in furnaces and kilns due to its high melting point.

In the field of dentistry, zirconium oxide is used to make dental crowns and bridges due to its strength and durability. It is also used in the manufacture of jewelry due to its diamond-like shine and hardness.

Health and Safety

Zirconium oxide is non-toxic and is generally considered safe for use. However, inhalation of zirconium oxide dust can cause respiratory irritation. Therefore, appropriate safety measures should be taken when handling zirconium oxide.

See Also

• Zirconium
• Ceramics
• Abrasive
• Refractory material
• Dentistry
• Jewelry