alumina bubble, made from high purity alumina and the product chemistry, is similar to that of white aluminum oxide.

alumina bubble, is an electric arc furnace product made from high purity  alumina and the product chemistry is similar to that of white aluminum oxide. Alumina bubbles are formed from molten alumina, resulting in hollow spheres of low bulk density.

Alumina Bubble

Index Properties Guarantee value Typical value Chemical composition (%) Al2O3 ≥98.5 99.48 Packing density (g/cm3) 0.5-1.0 0.74 Damaged rate(%) ≤15 12 Refractoriness(°C) 1800 Particle size 5-0.2mm

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