Alumina bubble firebrick is a type of insulating fire brick that adopts alumina powder and alumina hollow ball as the primary raw materials. These raw materials, combined with other binders, pass through high-temperature firing, which leads to the production of alumina bubble brick. Alumina bubble firebrick is manufactured using smelting blowing in an electric furnace.

Alumina bubble is a new thermal insulation material. It is made using commercial alumina, and its crystal form is a-Al2O3 mini crystal. Manufactures made into alumina bubble be able to withstand high temperatures, and the highest can reach 1800℃. Also, benefiting from their high-impact and light, the manufacturers are widely used in the petrochemical industry,