Type Index

Guarantee value

Typical value

Chemical Composition (%)

Al 2 O 3

70-77

75.30

SiO 2

22-29

24.08

Fe 2 O 3

≤0.1

0.05

R 2 O 3

≤0.5

0.18

RO

≤0.3

0.28

Mullite phase 3 Al 2 O 3 2Si O 2 (%)

≥95

Glass phase (%)

≤5

Linear expansion coefficient (1/°C)

-6.0×10 -6

Density of volume (g/cm 3)

≥3.0

Refractoriness( °C )

≥1840

Grain size (mm)

5-3 3-1 1-0

Color

White or Grey

Packing

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