Technical Data?Ceramic Balls

Typical chemical composition
SiO2 <80% MgO 0.6-1.2%
SiO2+Al2O3 >90% CaO 0.6-0.9%
TiO2 0.5-0.8% K2O 2.3-3.0%
Fe2O3 0.4-0.8% Na2O 0.5-0.8%
Soluble Fe:

Typical Physical properties
Density g/cm3 2.3-2.4
Water Absorption % 0.1-0.5
Eccentricity σmax /σmin <1.15
E-Modulus GPa 60
Mohs Hardness Scale 7-8
Specific heat, 30℃-100℃ J/kgK 840
Thermal conductivity 30℃-100℃ W/mK 1-1.5
Coefficient of thermal expansion (20℃-600℃)10-6K-1 4.7
Heat Resistance Up to ℃ 1000
Specific properties of ceramic balls
Size Packing density kg/m2 Spec,surface,m2/m3 Void space,% Compressive strength per ball, kg
1/8? 1350 720 44 300
1/4? 1350 520 44 600
3/8? 1350 350 44 1200
1/2? 1350 275 45 2300
3/4? 1350 190 45 4300
1? 1350 144 45 7950
1?? 1350 120 45 8500
1?? 1350 100 45 9100
2? 1350 72 45 9100