Bubble Alumina

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Description

GNPGraystar’s Bubble Alumina is produced by fusing special high purity alumina. The melt is atomized with compressed air which leads to the hollow spheres.


Bubble Aumina is hard but extremely friable with respect to its pressure strength. The melting point is approximately 2100°C. Due to its hollow spheres, it has a low bulk density and extremely low thermal conductivity. Bubble Alumina is chemically inert.

Los datos sobre este material han sido proporcionados por GNPGraystar Specialty Materials.

A menos que se indique lo contrario, todas las medidas corresponden a condiciones de temperatura ambiente. A menos que se indique lo contrario, se utilizan las unidades del SI.
Las normas armonizadas son similares a uno o varios estándares del proveedor. Es posible que algunas normas armonizadas se ajusten al estándar original, mientras que otras pueden quedar fuera de su alcance.

Ashby charts

Propiedades

General

PropertyValueComment

Densidad aparente

0.65 - 1.1 g/cm³

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depending on the size, refer to the table below

Rango de tamaño de partículas

2000.0 µm

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Aplicaciones térmicas

PropertyValue

Temperatura de fusión

2100.0 °C

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Chemical properties

PropertyValueComment

Aluminio

98.8 %

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Al₂O₃

Calcio

0.03

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CaO

Hierro

0.04

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Fe₂O₃

Magnesio

0.08

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Silicona

0.8

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SiO₂

Sodio

0.09

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Na₂O

Technological properties

Property
Application areas

Due to the above noted properties, Bubble Alumina is used in lightweight, high temperature refractories to form pores in high-porosity abrasives, and as a media to filtrate aggressive liquids or melts. It can also be used as a bed materials in the firing process of vitirified grinding wheels and other ceramic parts.

Color

White

Crystal structure

Alpha-Alumina

Other

Available Sizes & Typical Bulk Densities:


SizeBulk Density (g/l)Bulk Density (lb/ft²)
0 - 0.5 mm800 - 1,10050 - 70
0.5 - 1 mm650 - 85040 - 53
0 - 1 mm700 - 1,05044 - 66
0 - 2 mm650 - 1,00040 - 63