AFS70 AFS90 Zircon Sand

Typical Chemical Analysis:

ZrO2+HfO2                65.5-66.5%

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

Properties

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

Main Applications

Foundry ceramics chemicals glass refractory abrasive washing/cleaning/blasting and nuclear industry etc

Available sizes：60-100mesh 80-120mesh 100-200mesh 200-325mesh 200mesh 325mesh 2000mesh AFS70 AFS90