Type Index

Guarantee value

Typical value

Chemical Composition (%)

Al2O3

70-77

75.30

SiO2

22-29

24.08

Fe2O3

≤0.1

0.05

R2O3

≤0.5

0.18

RO

≤0.3

0.28

Mullite phase 3Al2O3 2SiO2(%)

≥95

Glass phase (%)

≤5

Linear expansion coefficient (1/°C)

-6.0×10-6

Density of volume (g/cm3)

≥3.0

Refractoriness( °C )

≥1840

Grain size (mm)

5-3 3-1 1-0

Color

White or Grey

Test standard

KTB01006-2003

Packing

25kg/plastic bag 1000kg/plastic bag At buyer's option