Introduction to the Application of Zirconia Crucible

Zirconia melting point up to 2700 °C, heat resistance, corrosion resistance is excellent, is one of the refractory materials with excellent refractory function in nature, its slag resistance is strong, the thermal conductivity decreases with the increase of temperature, even if heated to more than 1900 degrees Celsius will not have an effect with molten aluminum, iron, nickel, platinum and other metals, silicates and acid slag, so it can be used to make crucibles that melt precious metals, refractory ceramic tubes, etc. In view of this performance of zirconia, our company vigorously developed zirconia crucible, temperature resistance of 2000 °C, the current market has tended to mature, mainly divided into ceramic grade zirconia crucible and refractory grade zirconia crucible and refractory grade zirconia crucible two, both with yttrium oxide as a stabilizer, ceramic grade zirconia crucible density of 6.0G / cm3. Refractory grade zirconia crucible is a semi-porcelain crucible product, density of 4.5G/ cm3, containing micropores, its function is both zirconia ceramic crucible resistance, in the oxidation or reduction atmosphere is very stable, good chemical inertness, the metal melt and slag erosion resistance is very strong, inherit the refractory seismic resistance of refractory materials, in the application of the temperature gradient changes greatly improved, widely used in the smelting of platinum and other rare precious metals smelting.