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Bubble Alumina

Bubble Alumina

Bubble alumina is a type of high-purity, lightweight refractory material made from aluminum oxide (alumina) powder. It is produced through a high-temperature process in which alumina is melted and then blown into small bubbles using a special gas. The resulting material has a low bulk density and high porosity, making it an excellent insulating material for high-temperature applications.

Bubble alumina is commonly used in the production of refractory materials, such as insulation bricks and castables, due to its lightweight and thermal insulation properties. It also has high resistance to thermal shock and chemical corrosion, which makes it suitable for use in high-temperature environments where harsh chemicals are present.

In addition, bubble alumina is used as a filtration media in the metallurgical industry to remove impurities from molten metal. It is also used as a filler material in plastics and other composite materials to improve their thermal and mechanical properties.

Overall, bubble alumina is a versatile material that offers excellent thermal insulation and chemical resistance properties. Its lightweight and porous nature make it a popular choice in a variety of high-temperature applications.


Catalog No. CERAMICS
Size Customized
Material Al2O3
Purity 95% 99% 99.7%
Density 3.8~3.9 g/cm3


At CG Material, we offer high quality Bubble Alumina with exceptional purity and precision in terms of size. Our products range in diameter from 1mm to 100mm and have a purity level of up to 99.8%. We also provide custom manufacturing options for special shapes to meet specific needs.


Bubble Alumina Specifications


Sizing Bulk Density Sizing Bulk Density
0-0.2mm 1000-1450 0-3mm 650-950
0-0.5mm 800-1100 0-5mm 600-900
0.5-1mm 650-850 1-2mm 550-800
0-1mm 700-1050 1-3mm 550-800
1-1.5mm 550-800 2-3mm 500-750
0-2mm 650-1000 2-5mm 500-750
1.5-2mm 550-800 3-5mm 450-700

Chemical Composition:

Chemical Composition (wt%)
Al2O3 SiO2 MgO Na2O Fe2O3 CaO
98.8 0.8 0.05 0.1 0.03 0.3


-High Hardness

-Abrasion / Wear-Resistance

-Chemical Inertness

-Superior Insulating Properties

-Resistance to Thermal Shock

-Dielectric Properties

-High Melting Point

Bubble Alumina Applications


-High-Porosity Application



We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.



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