Alumina Bubble, bubble alumina is an electric arc furnace product made from high purity alumina. 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, and high insulating property.

Bubble alumina is used in the production of lightweight insulating refractories where low thermal conductivity and high temperature properties are the prime requirements. Alumina Bubble is also used effectively for loose-fill refractories, i.e. low density, high insulation refractory castable, or concrete, or ceramic bodies useful in a range of applications with temperatures up to 1800°C (3272°F).

Contact KT refractories for Alumina Bubble, Bubble Alumina, or other refractory raw material because we save you time and money!

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Alumina Bubble Data Sheet:

Index Properties		Guaranteed 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		diameter 5-0.2mm
Test standard		GB/T3044-89
Packing		20 kg/plastic bag (Damp proof)
Usage		Insulating