Specifications

Bubble alumina brick
1.Type: 85,90,99
2.Max temperature:1680c,1700c,1800c
3.Reheating linear change:about 0.3

High quality refractory insulation bubble alumina brick

Bubble alumina brick is based on the material of alumina bubble and alumina powder, add other binder, through being sintered in the temperature of 1700 °C,

then can be made.

 

It is one kind of ultra high temperature material and energy saving heat preservation material.

 

Parameter

Item	bubble alumina 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 temp.-1300C)	~7.8	~8.0	~8.6
Thermal    w/(m.k) conductivity(Average 800C)	<0.8	<1.3	<1.5

 

Application

Bubble alumina brick is used in the lining of high temperature furnace

also can be used as a kind of thermal insulation material in the high temperature kiln

of the industrial as refractory material, industrial ceramics, electronical ceramics, petrochemical and metallurgical industries.