Item
|
Index
|
Unit
|
Data
|
1
|
bulk specific gravity
|
g/cm3
|
3.2~3.3
|
2
|
average expansion rate (20-1000℃)
|
10-6/k
|
6.6~8
|
3
|
Thermal conductivity
|
W/(m.k)
|
2.6~3.8
|
4
|
Specific heat
|
KJ/Kg.k
|
1.2~1.4
|
5
|
refractoriness under load
|
℃(0.2Mpa)
|
1660
|
6
|
thermal shock resistance
|
℃/3 times
|
427
|
7
|
Soften humidity
|
℃
|
1730
|
8
|
Maximum Operating Temperature
|
℃
|
1650
|
9
|
Acid resistance
|
%
|
99.54
|
10
|
fastness to alkali
|
%
|
98.05
|
11
|
water absorption
|
%
|
5~10
|
Chemical composition
|
|
Composition
|
Data(%)
|
SiO2
|
6~8
|
A12O3
|
>90
|
Others
|
<4
|