Zircon sand AFS70 AFS90
Typical Chemical Analysis:
ZrO2+HfO2 ≥66.0%
Fe2O3 0.04～0.07%
TiO2 0.15～0.19%
Al2O3 0.40～0.90%
P2O5 0.06～0.09%
SiO2(Total) 32.2～33.2%
Free SiO2(as quartz) 0.25～0.45%
U 200～230PPM
Th 150～170PPM
Physical Properties
Refractive index:1.93 to 2.01
Specific Gravity:4.6-4.71g/cm3
Mohs Hardness:7.5-8
Melting point:2340-2550℃
Advantages
High refractive index
High melting point
High spatial and thermal stability at elevated temperatures
Low coefficient of linear expansion – good resistance to thermal shock
Moderate to high thermal conductivity
Low wettability by molten metal
Clean and round grains, which can be bonded at little cost and with little material
Binding ability with all organic and inorganic moulding sand binders
Chemical stability
Low solubility in molten silica or silicates
Good dielectric properties
Packing:30/40kgs PVC bags+1mt big bag or 1mt big bag
Main Appliations
Foundry,ceramics, chemicals, glass, refractory, abrasive washing/cleaning/blasting and nuclear indrustry etc
Available sizes:60-100mesh 80-120mesh 100-200mesh 200mesh 325mesh 2000mesh AFS70 AFS90
