Item

Brand

M70

M60

M45

SiO2(%)

28-30

36-39

49-55

Al2O3(%)

65-71

52-62

42-46

TiO2(%)

<2.0

<2.0

<2.0

Fe2O3(%)

<1.2

<1.5

<1.5

CaO(%)

<0.10

<0.22

<0.3

MgO(%)

<0.10

<0.21

<0.2

K2O(%)

<0.15

<0.3

<1.5

Na2O(%)

<0.15

<0.2

<0.5

Bulk Densityg/cm3

>2.8

>2.7

>2.5

Water Absorption%

<1.2

<1.2

<2.0

refractoriness

>1750

>1730

>1730

Mullite phase

>85

>75

>60