Zirconia fiber cotton is a polycrystalline oxide refractory fiber material that can meet the long-term use in an ultra-high temperature oxidizing atmosphere above 1600°C. Due to the high melting point (2700℃), non-oxidation and other high temperature characteristics of zirconia substance itself, fiber cotton manufacturers make zirconia fiber have a higher operating temperature and better heat insulation than the existing refractory fiber varieties on the domestic market. Performance, and high-temperature chemical properties are stable, corrosion resistance, oxidation resistance, thermal shock resistance, non-volatile, non-polluting, it is a well-deserved high-end refractory fiber material. Zirconia has three crystal phases: monoclinic, tetragonal and cubic. By adding stabilizer y2o3 to zirconia, the tetragonal or cubic zro2 can be stabilized, and the phase change of the zirconia fiber during the temperature rise and fall is avoided. The crystal phase structure of zirconia fiber is usually composed of pure tetragonal/cubic phase zro2.
The company has produced high-quality zirconia fibers by using unique preparation technology. Through high-temperature densification and sintering, the secondary grain growth of zirconia fibers when used at high temperatures is inhibited, thereby ensuring that the fibers can be used repeatedly at high temperatures for a long time.
Compared with inorganic fibers such as alumina fiber, mullite fiber, ceramic fiber, and quartz fiber, zirconia fiber has the following performance advantages:
1. The use temperature is high. The instant use temperature is as high as 1600℃.
2. The heat insulation performance is good. The thermal conductivity of zro2 is small among all metal oxides.
3. The corrosion resistance is good. The acid and alkali corrosion resistance of zro2 is much stronger than that of al2o3 and sio2.
4. It is not volatile and pollution-free under high temperature. The high temperature vapor pressure of zro2 in all metal oxides is low, and it is chemically inert. It is not easy to volatilize at high temperature and has no pollution.