alumina hollow ball for alumina bubble brick
alumina hollow ball for alumina bubble brick is a new type of high temperature insulation material which is made from industrial aluminum treated by smelting in an electric furnace. The crystal form is a-Al2O3 micro crystals.
alumina hollow ball for alumina bubble brick can be made into various shpes with the highest temperature 1800 ℃, which is of high mechanical strength, and the volume density is only one-half of corundum products.
There are mixed grade alumina hollow ball for alumina bubble brick and graded ball two types:
mixed-level ball diameter: 0.2-5mm
graded ball diameters: 0.2-1mm, 1-2mm, 2-3mm, 3-5mm.
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Chemical index for alumina hollow ball |
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size |
Al2O3 |
Fe2O3 |
SiO2 |
Na2O |
MgO |
K2O |
Cao |
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0.2-5mm |
≥99% |
≤0.15% |
≤0.3% |
≤0.5% |
≤0.1% |
≤0.1% |
≤0.1% |
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Physical index for alumina hollow ball |
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Bulk density |
refractoriness |
Shape |
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0.5-1g/cm3 |
1800 degree centigrade |
White hollow ball |
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Bulk density(g/cm3)
| Item | 5-4mm | 4-3mm | 3-2mm | 2-1mm | 1-0.5mm | 3-0.2mm | 0.5-0.2mm |
| g/cm3 | 0.45 | 0.55 | 0.65 | 0.75 | 0.85 | 0.85 | 0.95 |
alumina hollow ball:
