Have you ever anguished how to pick zirconia balls? Here's a quick chat:
1, Hardness of zirconia balls
Mohs and Vickers are commonly used indexes. The higher hardness of zirconia balls does not mean the lower abrasion ratio. From the situation of the abrasion between the grinding balls and the contact parts of the sanding mill (dispersion plate, rod pin and inner cylinder, etc), we can find that the grinding balls with high hardness have a greater abrasion on contact parts. However, the better optimizing points can be achieved by adjusting the filling amount of balls, the viscosity or flow of slurry and other parameters.
2, Density of zirconia balls:
Generally, the larger the specific gravity of the zirconia balls, the greater the impulse and the higher the grinding efficiency will be, as well as the relatively larger wear to the contact parts of the sanding machine (inner cylinder, dispersible plate, etc.), so the coordination with paste’s viscosity and flow become the key. In general, low - density balls are suitable for low - viscosity paste, and high - density beads are suitable for high - viscosity paste. When choosing zirconia balls, we should pay attention to the mutual cooperation between them and slurry so as to protect the machine from damage while showing good grinding performance.
3, Particle size of zirconia balls
The size of zirconia balls determines the number of contact points between the grinding balls and the material. The smaller the particle size is, the more the contact points are under the same volume, and the higher the grinding efficiency is theoretically. On the other hand, when grinding materials with relatively large particles, the impulse of small balls cannot reach the energy of fully grinding and dispersing, so the balls with large particle size should be adopted at this time.
