Type ZSA 3.7

Zirconia-silica-alumina ceramic beads

The sintered SiLibeads® type ZSA 3.7 grinding beads with a specific weight of 3.7 g/cm3 are so called zirconia reinforced alumina grinding beads and consist of a mixture of zirconia, silica and alumina. These grinding beads are ideally suited for use in both horizontal and vertical mills. The beads are available as standard in the size range 1.0 mm to 5.2 mm, with a fraction width of 0.2 mm in the range 1.0 mm to 2.2 mm and a fraction width of up to 1.0 mm in the range 2.2 – 5.2 mm. Special sizes and special fractions are available on request.

Fields of application

In the paint and lacquer industry, the ceramic beads SiLibeads® type ZSA 3.7 are suitable for grinding and dispersing lacquer and paint systems with both inorganic and organic pigments.  Due to the low specific weight of 3.7 g/cm3, these beads are suitable for the preparation of suspensions with lower viscosity.

In the production of technical ceramic components, ceramic beads SiLibeads® type ZSA 3.7 can be used to optimise raw material preparation.

In plant protection, SiLibeads® type ZSA 3.7 are used for dispersing fungicides, herbicides and insecticides.

In the mining and quarrying industry, SiLibeads® type ZSA 3.7 ceramic beads are often used for ultra-fine grinding of rocks containing minerals and precious metals, which significantly increases the yield and reduces costs.

Quality attributes

For the ceramic beads SiLibeads® type ZSA 3.7 finely ground raw materials are used.  A sintering process, individually adapted to this material contributes to the formation of the dense microstructure.  The grinding beads have a smooth surface and high roundness and are characterised by good mechanical properties, especially high fracture toughness.  This excellent quality and in conjunction with correct bead size choice and other parameters being matched, leads to high grinding levels and cost efficiency.

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