First, direct pyrolysis method.
Direct pyrolysis is suitable for preparing zirconia ceramic particles from metal carbonate. It can not only make full use of raw materials, but also protect the environment; The method is simple and suitable for industrial production. The key step of this process is the calcination of zirconia balls, and the thermal decomposition reaction produces a lot of gas, which must be heated slowly.
Second, the molding method
Molding is a widely used molding method. The advantages of this process are high production efficiency and easy automation. The product has small shrinkage and is not easy to deform. The disadvantage is that the size of zirconia ball is large and the spherical shape is not good. Molding method is mostly used to prepare simple porcelain pieces in the form of rods or disks, which requires high quality of molds. If small-sized ceramic balls are prepared, the efficiency is low.
3. Inverse suspension polymerization method
Suspension polymerization refers to the polymerization method in which monomers are dispersed in suspension medium in the form of droplets by mechanical stirring and dispersant. The system of zirconia ball is generally composed of monomer, oil-soluble initiator, water and dispersant. Inverse suspension polymerization is a polymerization in which water-soluble monomers are dispersed into fine droplets in organic solvents.