By this method, the grain size, particle shape, agglomerate size, and specific surface area can be modified within certain degree by controlling the precipitation and calcination conditions. Furthermore, its purity
Quartz crusher is also easier to be controlled. For the applications of zirconia in the slip casting, tape casting, mold injection and so forth, particle size and specific surface are important characteristics. Well-controlled precipitated zirconia powder can be fairly uniform and fine. Particle size can be made less than 1 m.
In order to achieve the requirement of the presence of cubic and tetragonal phases in their microstructure, stabilizers (magnesia, calcia, or yttria) must to be introduced into pure zirconia powders prior to sintering. Stabilized zirconia can be formed during a process called in-situ stabilizing. Before the forming processes, such as molding, pressing or casting, fine
artificial sand making machine particles of stabilizer and monoclinic zirconia are well mixed. Then the mixture is used for forming of green body. The phase conversion is accomplished by sintering the doped zirconia at 1700 C. During the firing (sintering), the phase conversion takes place.
Small particle, large specific surface area, desired particle size distribution will greatly enhance the sintering kinetics, such as shorter sintering time, lower sintering temperature and denser specific gravity of sintered body. However, the physical properties of powders also depend upon individual application. Forming processes such as tape casting and extrusion
mineral processing plant sometimes need a smaller specific surface area to enhance dispersion of the powders when mixed with solvents. Special efforts during the preparation of powders are needed to control initial particle size distribution, agglomeration, and calcination
There are many aspects, such as composition, impurity, particle size and specific surface area, must be taken into account, when one chooses a right zirconia or stabilized zirconia for his specific applications. Understanding of preparation processes, physical properties and phase transformation of zirconia and stabilized zirconia will definitely be advantages for the users. This article briefly discusses these aspects and gives reader some basic understanding of zirconia and stabilized zirconia.
