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AC2469 Alumina Foam Brick, Aluminum Oxide Foam Brick

Catalog No. AC2469
Material Al2O3
Purity >99.6%
Heat Conductivity Coefficient 0.85-1.2 W/(m.k)


Alumina Foam Brick Description

Special Shaped High Purity Alumina Ceramic Foam BricksAlumina foam brick has excellent resistance to corrosion and corrosion of molten aluminum, so it can effectively remove inclusions. Due to its lightweight and low thermal conductivity, the foamed alumina has less accumulated heat energy and obvious energy saving effect. The precise appearance dimensions of alumina filter bricks can speed up the masonry speed and ensure high strength and stability of the masonry.

Alumina Foam Brick Advantages

Alumina foam bricks have the following advantages:

– Higher strength than refractory ceramic fiber and lightweight ceramic brick.
– Low density
– Low thermal conductivity and linear thermal expansion coefficient.
– Great thermal shock resistance.
– Safe and rapid maintenance.

Alumina Foam Brick Specifications 

Bulk density/g·cm﹣³ 0.8 1 1.2 1.4 1.6
Al₂O₃ content/% ≥99.6 ≥99.6 ≥99.6 ≥99.6 ≥99.6
Impurity % ≤0.1 ≤0.1 ≤0.1 ≤0.1 ≤0.1
Compressive Strength (Mpa) ≥30 ≥65 ≥72 ≥97 ≥135
Reburning line change rate(1800°C×12h)% ≤0.45 ≤0.4 ≤0.35 ≤0.35 ≤0.3
Heat conductivity coefficient W/(m.k) 0.85 0.9 0.9 0.95 1.2
Mean temperature 1100±25°C
Working temperature/°C 1800 1800 1800 1800 1800
Max. temperature/°C 1850 1850 1850 1850 1850


Alumina Foam Brick Applications

Alumina ceramic foam brick can be used as the heat-insulating layer of the refractory lining on the hot side, especially the high-temperature reducing atmosphere furnace (1850 °C). It can be used for a long time under 1800 °C air and reducing atmosphere.


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Alumina Ceramic Foam Brick
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 2 reviews
by Ken Wills on Alumina Ceramic Foam Brick

Used on a gas welding table and withstands the over blow of the hot gasses well. It works well for my use.

by Frank Wolf on Alumina Ceramic Foam Brick

I use it for brazing and silver welding operations. These well-made bricks are very suitable for this application. If you need a heat-resistant surface for welding or brazing, I highly recommend these ceramic bricks.