Our zirconia crucible’s temperature resistance is around 2000 ℃, two types of them are divided as follows:
Refractory grade zirconia crucible, Density: 4.5g/cc, has micropores inside, also named a semi-ceramic crucible. It exhibits
corrosion resistance performance of zirconia, is stable in the oxidizing and reducing atmosphere, and it is very resistant to many solutions and slag. At the same time, it has the thermal shock resistance of refractory materials, which greatly improves the change of temperature gradient during use, and is widely used in the smelting of platinum and other rare precious metals. Three main size of this type: 250ml, 5.0mmOD x 8.0mm H, 6.8mmOD x 4.0mm H. The last one is used as a thermal analysis crucible; it solves the analysis for materials that will react with alumina crucible at a high temperature.
Ceramic grade zirconia crucible, density: 6.0g/cc, fully densified, and no pores. High-purity ceramic zirconia crucible is white, it will show yellow or grey if the purity is lower. It has stable chemical properties, except for sulfuric acid and hydrogen sulfuric acid, it has good stability to other acids, alkalis and alkali melts, glass melts and molten metals, low thermal conductivity, good thermal stability, and high temperature creep. The thermal conductivity is low, and the coefficient of thermal expansion is close to that of metal materials. It is an important structural ceramic material.