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Products > Other Product > > BFA Brown aluminum oxide
Product name : BFA Brown aluminum oxide
Name : BFA Brown aluminum oxide
Size/Shape : 0.05-10mm
Material/grade : Al2O3 99.55%,95%,90%-70%
Hardness/Density : 9.0moh
Package : 25kgs/bag,1000kgs/ton bag/pallet
Delivery : very fast,7-15day
Hot sale : 20/40mesh,30/60 mesh,1-3mm
Application :  refractory materials,sand blasting
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Details:

Brown fused alumina BFA

 

Definition:

Brown fused alumina, local name, also known as carborundum, is made of alumina, carbon materials, scrap iron three kinds of raw materials in electric furnace melting reduction and of brown alundum, reason for this name. Brown fused alumina is mainly chemical composition is AL2O3, and its content from 94.5% to 94.5%, the other contains a small amount of Fe, Si, Ti, etc.

The performance of the brown fused alumina:

Physical properties: the crystalline form of trigonal system

Chemical properties: the both sexes

Reaction with acid: slightly in aqua regia and hydrofluoric acid corrosion

Reaction with alkali: only a reaction heat and alkali solution

REDOX effect: no

Density: 3.90 g/cm3

Hardness: Mr Spectral hardness is 2000-2200 Kg/was, 9.0 mohs hardness

Color: dark brown, deep blue in colour after calcination

Melting point: 2250 C

The highest use temperature: 1900 C

Specific heat (Cal/g. C) 0.26 (20-90 - C)

Heat transfer coefficient at room temperature to 900 C (Cal/cm3. SEC. C)

Refractive index: e = 1.760 w = 1.768 (Na line)

Coefficient of expansion: 7-9 (0-1600 - C)

The application of the brown fused alumina:

Brown fused alumina teeth called industry: mainly used in refractory materials, grinding wheel, sand blasting.

 


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