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Prodcut Name:Alumina Bubble

Product Description

Alumina Bubble is produced by fusing special high purity alumina. The melt is atomized with compressed air which leads to the hollow sphere. It is hard but extremely friable with respect to its pressure strength. Alumina bubble is used in the production of lightweight insulating refractories where low thermal conductivity and high temperature properties are the prime requirements. It is also used effectively for loose-fill refractories.

Alumina Bubble is used in the production of lightweight insulating refractories where low thermal conductivity and high temperature properties are the prime requirements as well as for loose fill refractories. It can be used for sleeves production or high insulating ceramic shells for investment casting. It can also be used as a bed in the firing process of vitrified grinding wheels and as a media to filtrate aggressive liquids or melts.

Chemical Analysis
Al2O3	≥ 98.5%
SiO2	≤ 0.25%
Fe2O3	≤ 0.15%
Na2O	≤ 0.4%

Physical Properties

Crystallography: Alpha alumina, in the hexagonal crystal system

Color: White

Shape: Spherical shaped hollow bubbles

Standard: GB/T3044-89

Available sizes: 0.1-5.0mm.

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