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Project | Quality | |
Chemical composition% | SiO2 | >72% |
CaO | >8% | |
Na2O | <14% | |
MgO | >2.5% | |
Al2O3 | 0.5-2.0% | |
Fe2O3 | 0.15% | |
Others | 2.0% | |
Refractive Index | Nd≥1.5% | |
Density | 2.4-2.6g/cm3 | |
Size distribution | Oversize ≤5% under size ≤10% | |
Wire diameter | 0.03-0.4mm | |
Durability | 3-5 % | |
Hardness | 6-7 MOHS ;46HRC | |
Microhardness | ≥650kg/cm3 | |
Circularity | Round rate of ≥90% |