What is zirconia, exactly?

Zirconium dioxide is the main zirconium oxide. Its chemical formula is ZrO2, and it is white with odorless and tasteless crystals. It is insoluble and insoluble in water and hydrochloric acid. It is chemically inactive. It has the properties high melting point and high resistivity.

Zirconia’s main application areas

Raw materials and compounds of metal zirconium

It is used for the production of metal zirconium or zirconium compound, making refractory blocks and crucibles as well as high-frequency ceramics. Mainly used to make piezoelectric ceramic products. This is used for the production of steel and other non-ferrous materials, optical glass, and zirconium dioxide fibres. It’s also used in ceramic pigments and electrostatic coatings. It can be used in epoxy resins to improve corrosion resistance for heat-resistant salt water.

Refractory

Zirconia fiber can be described as a polycrystalline refractory fibre material. ZrO2 has a higher service temp than other refractory fibres like mullite fiber and aluminum silicate fiber due to its high melting point, nonoxidation, and other excellent properties at high temperatures.

Zirconia can be used in an ultra high temperature oxidizing atmosphere at 1500°C for up to two years. Its maximum service temperature is 2200°C. ZrO2’s resistance to acid and alkali corrosion is superior to that of SiO2O3 and Al2O3. Insoluble in water; soluble in sulfuric and hydrofluoric acids; slightly soluble hydrochloric and nitric acids. It can be fused in alkali to create zirconate.

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