Overview
Zirconia ceramics is a ceramic material with zirconia as the main body. It is different from traditional ceramics in terms of structural ceramics. Zirconia has high strength, wear resistance and flexibility, far exceeding most other technical ceramics. Zirconia is a very strong technical ceramic with excellent properties in terms of hardness, fracture toughness and corrosion resistance.
In terms of structural ceramics, zirconia ceramics are widely used in the field of structural ceramics due to their high toughness, high flexural strength, high wear resistance, excellent heat insulation performance, and thermal expansion coefficient close to steel.
Zirconia Ceramic Density: The theoretical density of pure zirconia is 5.89g/cm3. However, pure zirconia ceramics are prone to cracking at around 1100 °C, but can be stabilized at room temperature after adding yttrium oxide stabilizers. Therefore, the density of yttria-stabilized zirconia is 6.05 (g/cm3)
Chemical formula of zirconia ceramics: the molecular weight of pure zirconia is 123.22, the chemical formula is ZrO2, and the melting point is 2715°C. Usually contains a small amount of hafnium oxide, but has no significant effect on the properties of zirconia.
Zirconia ceramic hardness: Zirconia is a very strong industrial ceramic with a hardness as high as HV 1250 or more. Moreover, its fracture toughness is very good, and it can be used to make various knives.
Properties of zirconia ceramics: density: 6.05 (g/cm3), hardness: Rockwell hardness HRA78, excellent fracture toughness – impact resistance, high temperature resistance: 800°C, melting point: 2850°C, good friction performance, resistivity : 108/Ω.m, thermal conductivity: 20°C 2.0 W/(m.K), acid and alkali corrosion resistance, bending strength: 800Mpa, compressive strength: 2100MPa, steel elastic modulus: 250GPa, thermal expansion coefficient similar to iron
Zirconia ceramic uses: wire forming/drawing dies, insulating rings in thermal processes, precision shafts in high wear environments, furnace treatment tubes, wear pads, thermocouple protection tubes, sandblasting nozzles, refractories, extrusion Molds, bushings and covers, kiln crucibles, fiber optic ferrules and sleeves, wear-resistant knives and blades, fuel cell parts, bearings and rollers, welding nozzles and pins, laser parts, gas igniters, electrical insulators, ceramic guides , oxygen sensors, medical and surgical components, mechanical seals, pumps, pistons and cylinder liners.
