Specifications

Alumina Bubble Bricks
1.Alumina content:85%,90%,99%
2.Max temperature:1800C
3.Bulk Density:1.4-1.7g/cm3
4.Used in furnace

 

 

 

Alumina Bubble Brick is made of alumina hollow ball and alumina powder at 1750C, combined with other anchoring agent.

 

Alumina bubble bricks are primarily used for lining of high temperature furnace and thermic insulant of ultra-high temperature furnace of the industrial as refractory material, industrial ceramics, electronic ceramics, petrochemical and metallurgical industries.

Item	Al2O3 Bubble Brick
	85 type	90type	99type
Max temperature	1680	1700	1800
Al2O3  %	>85	>90	>99
SiO2  %	<13	<8	<0.2
Fe2O3 %	<0.2	<0.2	<0.2
Bulk density    g/cm3	1.4-1.7	1.4-1.7	1.4-1.7
Cold crushing strength  Mpa	>12	>10	>9
Reheating linear change % (1600C x3h)	±0.3	±0.3	±0.3
Thermal expansion coefficient x10 -6 (room tem.-1300C)	~7.8	~8.0	~8.6
Thermal    w/(m.k) conductivity(Average 800C)	<0.8	<1.3	<1.5