What is alumina bubble brick?

Alumina bubble brick is a type of refractory brick that is made from high-purity alumina powder and alumina hollow spheres. Alumina bubble bricks are characterized by their high heat resistance, low thermal conductivity, and excellent thermal shock resistance. They are typically used in applications where high temperatures and thermal cycling are common, such as in industrial furnaces, kilns, and other high-temperature equipment.

The production process of alumina bubble brick involves mixing high-purity alumina powder with a foaming agent and water to form a slurry. This slurry is then poured into a mold or pressed into shape, and heated at a high temperature to sinter the alumina powder and create the desired brick shape. The addition of alumina hollow spheres, which have a low density and high porosity, to the mixture helps to reduce the overall weight and thermal conductivity of the brick while maintaining its high strength and heat resistance.

Alumina bubble bricks have a variety of advantages over other refractory materials, including their excellent thermal insulation properties, high-temperature stability, and resistance to thermal shock and abrasion. They are also resistant to chemical attack and can withstand exposure to corrosive gases and molten metals. Due to these properties, alumina bubble bricks are widely used in industries such as steelmaking, petrochemicals, and ceramics manufacturing.