zirconia products application fields
Zirconia is one of our many products. Where is zirconia specifically used? Let professional ceramic manufacturers introduce to you the application fields and functions of our products, and which high-quality properties can be used by us.
The application of plasma sprayed zirconia thermal barrier coating in gas turbine for aviation and industry has made great progress, and it has been used in the turbine part of gas turbine to a certain extent. As the coating can reduce the temperature of air-cooled high-temperature parts by 50 ~ 200 ℃, it can significantly improve the durability of high-temperature parts, or allow to increase the gas temperature or reduce the demand of cooling gas to keep the temperature of high-temperature parts unchanged, so as to improve the efficiency of the engine.
Zirconia is used as raw material in kiln industry because of its high refractive index, melting point and corrosion resistance. Piezoelectric ceramic products include filters, loudspeakers, ultrasonic underwater acoustic detectors, etc. There are also daily ceramics (industrial ceramic glaze), zirconium bricks and zirconium tubes for smelting precious metals. Nano zirconia can also be used as a matrix material of polishing agent, abrasive, piezoelectric ceramic, precision ceramic, ceramic glaze and high temperature pigment
Zirconia has two main refractory markets. First, the main market is continuous cast steel refractories, especially constant pressure products. These products include zirconia for use in intermediate launders and ladle outlets and immersion nozzles. Sliding baffles also require zirconia, heavy zirconia, especially for exposure to high temperature central areas. Part of the stable calcium oxide and magnesia zirconia are in use. However, in zirconia manufacturers, calcium oxide is usually cheaper (but the use effect is not as good as that of yttrium).
Zirconia has three crystal forms: monoclinic, tetragonal and cubic. At room temperature, zirconia only appears as a monoclinic phase, which changes into a tetragonal phase when heated to about 1100 ℃, and into a cubic phase when heated to a higher temperature. Due to the large volume change when the monoclinic phase changes to the tetragonal phase, and the large volume change when the cooling phase changes to the opposite direction, it is easy to cause product cracking, which limits the application of pure zirconia in the high temperature field. However, after adding stabilizer, tetragonal phase can be stable at room temperature, and zirconia can be used. Therefore, the volume mutation will not occur after heating, which greatly expands the application range of zirconia.