INDEX

ITEMS

M45

AL2O3,%

41-43

Fe2O3,%  ≤

0.50

SiO2,%   ≥

53-55

TiO2,%   ≤

0.80

CaO,%   ≤

0.30

MgO,%   ≤

0.30

Na2O,%  ≤

0.20

K2O,%   ≤

1.50

Mullite phase,%≥

55

 Amorphous state SiO2 glass,%  ≥

45

 linear expansion test,(20-1000°C)/K-1  ≤

4.4X10-6

Real gravity,g/cm3   ≥

2.70

Bulk density ,g/cm3

2.50-2.60

True Porosity,%   ≤

8

Hardness

7-8

Refractoriness,°C

1750/1770

Crystalline phase SiO2

None