Alumina Bubble Brick

Product Introduction：
Alumina Bubble Bricks is a type of ultra-high temperature energy-saving and insulation material made from aluminum hollow balls and aluminum powder as the main raw materials, combined with other binders, and fired at a high temperature of 1750 ℃.
 
Product Highlights:
Alumina Bubble Bricks possess large quantity of closed pore, have the characters of light weight   &high temperature resistance, low thermal conductivity, high strength, tiny reheating linear   change, good thermal shock resistance, etc.Bubble Alumina Bricks can greatly improved the   furnace heat fficiency, shorten production circle, lighten furnace weigh and realize energy   saving.

Application:
Mainly used as lining and insulation material for high-temperature furnaces in industries such as industrial ceramics, electronic ceramics, petrochemical, metallurgy, refractory materials, etc,such as Shuttle kiln,tunnel kiln,pushed slab kiln,carbon black reactor,reformer,brighten stainless steel annealing furnace,powder metallurgy furnaces,battery material sinter furnace,etc.

Technical Data:
 

Main Physical and Chemical Properties
Item	Alumina Bubble Brick			Alumina Zirconium Bubble brick
Specifications	85 Brick	90 Brick	99 Brick	98 Brick
Max  Service  Temperature ( ℃)	1680	1700	1800	2200
AL2O3 %	≥85	≥90	≥99	——
ZrO2 %	——	——	——	>98 (Containing stabilizers)
SiO2%	≤13	≤8	≤0.2	≤0.2
Fe2O3%	≤0.2	≤0.2	≤0.2	≤0.2
Bulk Density(g/cm³)	1.4~1.7	1.4~1.7	1.4~1.7	≤3.0
Cold Crushing Streng(MPa)	≥12	≥10	≥9	≥8
Refractoriness under Load℃(0.1 Mpa0.6%)	≥1650	≥1700	≥1700	≥1700
Change Rate of Reheating Line（%） (1600℃x3h)	0.3	0.3	0.3	0.2
Thermal Expansion Coefficient x10(Room temp-1300℃)	7.8	8.0	8.6	9.1
Thermal conductivity (average Averaga 800 ℃) w/(m.k)	≤0.8	≤1.3	≤1.5	≤0.3

 
 

Alumina Hollow Ball Insulating Refractory Brick
Brand  Item	Mullite Combined alumina hollow ball brick			High Purity Alumina Hollow Ball Brick
	DHM-1.1	DHM-1.3	DHM-1.5	DHA-1.3	DHA-1.5	DHA-1.7
Bulk Density(g/cm3)≤	1.1	1.3	1.5	1.3	1.5	1.7
Cold Crushing Streng(MPa) ≥	5.0	6.2	8.0	6.2	8.0	10.0
The change in the reheating line shall not exceed 2% (Degrees Celsius xh) ≤	1550×8	1600×8	1650×8	1700×8	1700×8	1750×8
Thermal Conductivity (350 ± 25 ℃) ≤	0.45	0.55	0.65	0.55	0.65	0.75
Thermal shock stability 1100 ℃ Air cooling frequency	30	25	25	20	20	20
AL2O3(%)  ≥	90	95		99
Fe2O3(% ) ≤	0.4	0.5		0.4

 
 

Brand  Item	BA-85	BA-90	BA90-1.2	BA-99	BA-993
Max Service Temperature（℃）	1750	1800	1800	1850	1850
Bulk Density(g/cm3)	1.4-1.9	1.4-1.9	1.2	1.4-1.8	1.4-1.8
Cold Crushing Streng(MPa)	18.0	15.0	11.9	15.0	12.0
Refractoriness under Load （0.1Mpa,0.6%）	≥1700	≥1700	≥1700	≥1700	≥1700
Permanent Linear Change (1650℃ x12h)	±0.3	±0.2	±0.2	-0.25	-0.25
Room temp. to 1300℃(Thermal expansion coefficient x10 ·6)	7.8	8	8	8.6	8.6
Thermal Conductivity (Average 800 ℃)	0.55	0.60	0.21	0.75	0.75
AL2O3(%)	85	90	91	99	99
SiO2 (%)	14	8	8	0	0.15
Fe2O3 (%)	0.2	0.2	0.1	0.1	0.1