Zirconium oxide powder is used in many industries for different purposes. It is a versatile material that is known for its thermal resistance, optical properties and mechanical strength. Zirconium oxide is also used in fuel cells, refractories and ceramics.
Zirconium oxide powder is manufactured by adding a metal hydroxide to zirconia sol. This can be done using either a traditional method or by ultra-filtration. The metal hydroxide can be selected from a number of different salts. These salts include chlorides, sulfates and acetates.
Once the metal salt is added to the zirconia sol, it is then calcined. The resulting powder can then be dehydrated or used for another application. After drying, the powder can be uniformly dispersed, resulting in high strength and density. Alternatively, the powder can be made less coagulative and disintegrable.
A further method to produce zirconia oxide powder is to add a stabilizer to the solution. Typically, stabilizers are derived from metal hydroxide. For example, yttrium hydroxide is added to the zirconia sol to create yttria stabilised zirconia.
Another method to produce a sol is by hydrolyzing an aqueous solution containing zirconium salt under heating. This solution can then be ultra-filtered to separate the zirconium from the other elements. Once this process is completed, the zirconium sol can then be diluted with an organic solvent to form zirconia powder.
In addition to the above methods, zirconia oxide can be produced by chemical precipitation of the chemicals. This process can result in a monoclinic or monodentate crystal of zirconium oxide.