Items

Unit

Index

Typical

Chemical

composition

SiO₂

%

51-53

52

Al₂O₃

%

44-46

45

Fe₂O₃

%

1 max

0.6

Ti₂O

%

0.6 max

0.4

Refractoriness

℃

1750 min

Bulk density

g/cm³

2.50 min

Mohs hardness

---

7-8

Loss on ignition

%

0.25 max

Mullite phase

%

56-65

pH value

---

6-8

Refractory grade

Grains

mesh

16/30, 30/60,  

Powder

mesh

-60, -80, -200, -270, -320

Application: Refractory, Investment casting and Ceramics Industry