The properties and applications of zirconia ceramics
1. The properties of zirconia ceramics
Zirconia ceramics have high density, high hardness, especially have the highest mechanical properties, say, bending strength and fracture toughness among all advanced ceramics.
2. Applications of zirconia ceramics
In adiabatic internal combustion engines, tank-varying zirconia ceramics can be used as cylinder linings, piston crowns, valve guides, intake and exhaust valve seats, bearings and piston rings, etc., and can be used as rotors in rotary cylinder engines.
Zirconia ceramics can be used as wear-resistant and corrosion-resistant parts, such as bearings used in the mining industry, mud pump seals for the chemical industry, blades and pump bodies, as well as molds (wire drawing dies, pull tube dies, etc.), cutters, nozzles, heat insulators, wear-resistant and corrosion-resistant parts for rocket and jet engines, and high-temperature structural materials for nuclear reactor engineering.
Zirconia ceramics can also be used as power conductive ceramics.
With the conductivity of ZrO2 at high temperatures, zirconia conductive ceramics can be used as high temperature electrodes and heating materials.
The use of ZrO2 has the property of transferring oxygen ions under certain conditions, and can be made into solid oxygen concentration batteries, oxygen sensors, and determination of oxygen concentration.
Oxygen concentration battery can measure oxygen concentration, manufacture fuel cell, make oxygen, hydrogen production by moisture method, etc.
The oxygen meter for steelmaking can accurately determine the oxygen content in molten steel. The main body of the oxygen analyzer is ZrO2 solid electrolyte.
The zirconia oxygen sensor can be used to determine the oxygen content in the vehicle exhaust, so as to control the air-fuel ratio, so as to save fuel and reduce the pollution of the exhaust gas.
In addition, the thermal conductivity and electrical conductivity of zirconia conductive ceramics can also be utilized as a high-temperature heating material (maximum heating temperature in air up to 2100-2200°C) and high-temperature electrode materials (for example, electrodes in magnetofluid generators).