Grinding media can be divided into glass beads, ceramic beads (including zirconium silicate balls, composite zirconium balls, aluminum oxide balls, rare earth metal stabilized zirconia balls, etc.), steel beads, etc. according to different materials

Grinding media can be divided into glass beads, ceramic beads (including zirconium silicate balls, composite zirconium balls, aluminum oxide balls, rare earth metal stabilized zirconia balls, etc.), steel beads, etc. according to different materials. The crystal structure of zirconia balls is determined by differences in chemical composition and manufacturing processes. The dense crystal structure ensures high strength, high wear resistance, and low ink absorption rate of the beads. The different percentage contents of various components determine the specific gravity of the grinding beads, and a high specific gravity provides a guarantee for the efficiency of grinding;

The chemical composition of grinding beads can have a certain impact on the performance of the slurry due to natural wear during the grinding process, so in addition to considering low wear rates, the chemical elements to be considered are also factors to be taken into account. When grinding magnetic tape powder or other electronic component slurries, metal elements such as Fe and Cu should be avoided. Grinding beads containing Fe2O3 or CuSO4 are not among the options, so choosing zirconium balls is often a common choice in this industry; In the fields of grinding pesticides, pharmaceuticals, and biochemistry, heavy metals are considered as important elements, while PbO is the most common component.

In short, the physical properties (hardness, density, wear resistance) determined by the chemical composition of beads and their own wear on the contamination of the slurry are factors to be considered when selecting grinding media.

Physical properties of zirconia balls

Density of grinding media: Density is usually expressed in terms of specific gravity (true specific gravity) and bulk weight (false specific gravity) in documents. The molecular weight and percentage composition of various oxides determine the density of grinding. The densities of commonly used grinding media are shown in Table 1.