Next Generation Ceramic Media

The beads or ball, have been chosen as a media for the process of mixing, crushing, dispersing and purifying variable materials. Steel media is commonly used but can not be used for manufacturing bright colors and steel contamination could be a problem for some products. Ceramic beads reduce contamination to products and perform as well as steel.

Why Ceramic Bead?

What is Zirconia?


Generally speaking, oxides are named by changing the suffix of the constituting metal element "-ium" to "-a" , such as alumina for aluminium oxide and titania for titanium oxide. Zirconia is therefore the same as Zirconium Oxide (Zr02).


Zirconia is used in Grinding media, Cutting Tools, Ferruls, Oxygen Sensor, Cubic Zirconia(as Jewelry) and Refractory Materials, because zirconia has high hardness, strength, toughness, excellent wear resistance (structural properties), electrical conductivity(electrical properties), and low thermal conductivity (thermal properties). Specially, Zirconia Beads make the best use of structural properties in specific characters of Zirconia.

  • FSZ (Fully Stabilized Zirconia)
  • PSZ(Partial Stabilized Zirconia)
  • TZP(Tetragonal Zircoia Polycrystal) or TTZ(Tetragonal Toughened Zirconia)
  • Zircon( Zirconium Silicate)Although the name resembles zirconia (zirconia is called "zircon" in France)

Ytrria Stabilized Zirconia

High density and hardness Yttria Stabilized Zirconia Beads ZY are offering the user higher productivity, longer mill life and lower operation cost in the long run. Available Size: 0.1, 0.3, 0.6, 0.8, 1.0, 1.5, 2.0 and 2.7 mm with 100% Round and uniformed.

Ceria Stabilized Zirconia

Ceria Stabilized Zirconia Beads CZ offers the highest density 6.2 g/cm2, optimized wear resistance and cost effectiveness for efficient milling. Available Size: 0.3, 0.6, 0.8, 1.0, 1.5, 2.0 and 2.7 mm with 100% Round and uniformed.

Composition Density g/cm3 Bulk Density kg/l Hardness Hv Color
ZY ZrO2 / Y2O3 >6.02 > 3.7 >1350 Ivory
CZ ZrO2 / CeO2 >6.20 > 3.9 >1250 Brown

Other Grinding Media
Composition Density Bulk Density Hardness Color
Steel See steel info 7.8 4.9 60-65 RC Silver
Glass SiO2 2.5 1.6 Transparent
Alumina Al2O3 3.8 2.2 1600 Hv White
Zircon ZrSiO4 3.8 2.4 1000 Hv White
ZY ZrO2+Y2O3 6 3.6 1300 Hv Ivory
CY ZrO2+CeO2 6.2 3.8 1200 Hv Brown

By carefully considering factors such as grinding precision, the various characteristics of the different materials, and the different types of grinding machines, STR Industries can recommend the most suitable grinding media for customers, thus helping customers to achieve their ultimate goals of productivity improvement and cost reduction. We believe in maintaining favorable relationships with our customers as business partners.