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Refractory Material

Alumina Bubble

Items
Unit
Index
Chemical composition
Al2O3
%
98.5min
SiO2
%
0.25max
Fe2O3
%
0.10max
Na2O
%
0.40max
Refractoriness
°C
1800min
Principal crystalline
--
a -Al2O3
Packing density
g/cm3
0.50~1.00
Particle size
mm
0.2~5
Light Weight Alumina Bubble Castable Refractory
Properties
Brands
OR-light
ORM-18
Chemical composition(%)
Al2O3
95
95
SiO2
0.5
0.5
max service temperature ( ° C )
1800
1800
bulk density after burnt at 1500 ° C(g/cm3)
1.35-1.40
1.35-1.40
Linear changes after burnt at (1500°C3h)(%)
0.5
0.5
compressive / bending
strength ( MPa )
110 ° C24h
8 /3
8/3
1100 ° C3h
15/4
15/4
1500 ° C3h
20/6
25/ 6
max particle size of bubbles(mm)
5
5

water content for construction (%):
9-12
9-12
thernel conductivity coefficient(w/m.k)
0.7-0.8
0.7-0.8

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