Brown aluminum oxide is a brown synthetic aluminum oxide produced by smelting reduced bauxite, carbon and iron in an electric arc furnace.The main chemical composition of brown aluminum oxide is Al2O3, the content of which is 95.0% and 97.00% respectively, and also contains a small amount of Fe, Si, Ti and other elements.Brown aluminum oxide is the most basic abrasive. Artificial abrasive made of white aluminum oxide, aluminum oxide (Al2O3) content is more than 99%, and contains a small amount of iron oxide, silicon oxide and other components, white color.So, what is the difference between brown aluminum oxide and white aluminum oxide?
1. Different raw materials: the raw material of brown aluminum oxide is bauxite, in addition to anthracite and iron.
The raw material of white aluminum oxide is aluminum oxide powder.
2.Usages are different: brown aluminum oxide can be manufactured ceramics, resin high consolidation abrasive and grinding, polishing, sandblasting, precision casting, etc., can also be used to manufacture advanced refractory materials.
White aluminum oxide is suitable for grinding fine grained abrasives such as high carbon steel, high speed steel and stainless steel. White corundum can also be used for precision casting and high-grade refractory materials.
3. Different properties: brown aluminum oxide has the characteristics of high purity, good crystallization, strong liquidity, low linear expansion coefficient and corrosion resistance. White aluminum oxide has the characteristics of high purity, good self-sharpening, acid and alkali corrosion resistance, high temperature resistance and stable hot state performance. In comparison, the hardness of white aluminum oxide is higher than that of brown aluminum oxide.
4. Composition is different: although brown aluminum oxide and white aluminum oxide are containing alumina, but the alumina content of white corundum is more than 99%, the alumina content of brown corundum is about 95%.
5. Different colors: because the alumina content of white aluminum oxide is higher than that of brown aluminum oxide, the color of white corundum is white, and the color of brown corundum is brown and black.
6. Different production: white aluminum oxide is produced with aluminum oxide powder (the same raw material as electrolytic aluminum), while brown aluminum oxide is produced with calcined bauxite.
7. The use of different objects: white aluminum oxide is using some high-end users, cutting strength is better, because it polishing effect is also very good, more used for carbon steel, alloy steel, malleable cast iron, hard bronze, etc., and brown aluminum oxide is widely used, and the market dosage is bigger, more for Cui fire steel, high speed steel, high carbon steel and so on.
White aluminum oxide has strong cutting force, used to remove metal or non-metal burrs, burrs before batch, etc. It has the function of polishing the surface of parts and belongs to medium polishing abrasives.
Brown aluminum oxide is used to remove burrs on the surface of stainless steel, carbon steel, aluminum alloy and other hardware parts. The grinding of brown aluminum oxide is not as fine and bright as that of white aluminum oxide
The above is small make up for you to introduce the difference between brown aluminum oxide and white aluminum oxide.
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Brown Fused Alumina