Items

Unit

Index

Typical

Chemical

composition

SiO₂

%

99.5 min

99.8%

Al₂O₃

ppm

500 max

300

Fe₂O₃

ppm

100 max

50

Na₂O

ppm

150 max

80

K₂O

ppm

150 max

80

Loss on ignition

%

0.08

Melting point

℃

1713

Density

g/cm³

2.65

Mohs hardness

---

7.00

 Size                 

mesh

4/10, 10/20, 20/50, 50/100

Application:  Refractory, Glass, Electronic industry