1. High hardness: the hardness of zirconia products can generally reach more than 7.5 Mohs hardness, and the hardness of some products such as zirconia ceramics can exceed 9, second only to diamond. High hardness means that it has strong wear resistance, so zirconia ceramic is a good anti-wear material.
2. High melting point: zirconia has a melting point as high as 2715 ℃ and stable chemical properties. It is an excellent refractory material.
3. Low thermal conductivity and low expansion coefficient: the thermal conductivity of zirconia is relatively low (1.6-2.03W/(m.k)) among common materials, and the thermal expansion coefficient is close to that of metal. Therefore, zirconia ceramic is suitable for making junction ceramic materials, such as zirconia ceramic mobile phone appearance structural parts.
4. Special conductivity: Zirconia is non-conductive at room temperature and has great resistivity, but it has certain conductivity at high temperature. Using this principle, zirconia is also applied to many electronic devices.
