Zirconia Bubble Brick is a kind of insulating refractory product, the main material is zirconia hollow ball. (The principle
crystalline phase of zircon hollow ball brick is cubic zirconia, account for about 70%~80% of mineral, refractoriness is more than 2400℃, the apparent porosity is 55%~60%, the volume density is 2.5~3.0 g/cm3, the compression strength is not less than 4.9 MPa, the thermal conductivity is 0.23~0.35w/(m·K). The production method of zirconia hollow ball insulation bricks are same as that of the Al2O3 oxide, just its fusion temperature is higher, can reach up to over 2700℃,