Milling Beads
Milling beads made of Glass, Zirconium Silicate and Zirconium Oxide
Glass or zirconium oxide milling beads are used for extremely fine dispersion and milling in horizontal, vertical and basket mills. Glass beads are generally inexpensive and the required fineness of grind can frequently be achieved with them.
If the required dispersion result cannot be achieved using glass beads, the use of zirconium oxide beads is highly recommended.
With their bulk weight of 3.7 kg/litre, zirconium oxide beads have high kinetic energy and very good dispersion efficiency. Due to the zirconium oxide beads being cerium stabilized, they have a high fracture resistance and excellent abrasion resistance.
Comparison of milling beads:
Glass milling beads unleaded
Zirconium Silicate milling beads
Cerium stabilized Zirconium Oxide milling beads
Yttrium stabilized Zirconium Oxide milling beads
Colour
clear-transparent
white
brown
pearl-white
Specific weight
2.6 kg/l
4.1 kg/l
6,2 kg/l
5,9 kg/l
Bulk weight (1,2-1,4mm)
1,53 kg/l
2,43 kg/l
3,82 kg/l
3,68 kg/l
Vickers hardness (HV10)
400
1000
1100
1150
Moh hardness
5+
8+
9+
9+
Youngs-Module
77 GPa
100 GPa
205 GPa
210 GPa
Durability in hours
<500
<1000
<4000
<6000
Food Contact
+
-
-
+
Glass milling beads unleaded
Zirconium Silicate milling beads
Cerium stabilized Zirconium Oxide milling beads
Yttrium stabilized Zirconium Oxide milling beads
Colour
clear-transparent
white
brown
pearl-white
Specific weight
2.6 kg/l
4.1 kg/l
6,2 kg/l
5,9 kg/l
Bulk weight (1,2-1,4mm)
1,53 kg/l
2,43 kg/l
3,82 kg/l
3,68 kg/l
Vickers hardness (HV10)
400
1000
1100
1150
Moh hardness
5+
8+
9+
9+
Youngs-Module
77 GPa
100 GPa
205 GPa
210 GPa
Durability in hours
<500
<1000
<4000
<6000
Food Contact
+
-
-
+