電熔白剛玉(White Fused Corundum)
White fused alumina is made from excellent industrial alunima and melted in arc furnaces at high temperature. It has the following characteristics such as nice white colour, firm bulk density, high hardness, good heat-resistance and acid resistance etc. It is not only the excellent raw material for manufacturing abrasive, but also the raw material for grinding and polishing. The product has been widely used in many high-tech industrials such as precision casting, steel refractory, chemical refractory, ceramics, military and electronics.
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物理性能
Physical Properties
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化學成分
Chemical composition (%)
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粒度砂
Particle Size
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細粉
Fine Powder
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主晶相：α-AL2O3
Principel crystal phase：α-AL2O3
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AL2O3
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≥99
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≥98.5
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晶系：六方體
Cystal system ：Hexzagon
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Na2O
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≤0.4
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≤0.4
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色澤：白色
Colour and loustre：White
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SiO2
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≤0.2
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≤0.25
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真密度（g/cm3）：≥3.95
Ture densty：（g/cm3）：≥3.95
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Fe2O3
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≤0.15
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≤0.5
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堆積密度 Packing density（g/cm3）：1.75-1.95
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模式硬度 Mohs hardness： 9
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線膨脹系數 Linear expansion Coefficent（1/℃）：8.3× 10-4
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粒度尺Grain size（mm）
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3-5 ，1-3 ，0-1
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細度Fine Powder（目mesh）
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80 ，120 ，240 ，320等
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微粉Micro Powdr（μm）
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3-5 ，5-10
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