Alumina bubble is a hollow spherical thermal insulation material produced by the fusion method. It is characterized by low density, closed porosity, and excellent high-temperature resistance. It serves as an ideal insulating filler for high-temperature furnaces and is also a high-quality aggregate for lightweight refractory castables. In addition, it is an excellent refractory material for high-temperature thermal insulation and energy-saving applications.

Packaging: outer woven bag with inner plastic lining, 500 kg per bag, top and bottom open; or 20 kg paper bags.