Brown fused aluminum oxide and white fused aluminum oxide are both widely used in industry with broad application scopes; they are basic abrasives. However, what are the main differences between them in actual use? Below, we delve into a detailed understanding from aspects such as raw materials, applications, and composition.
1. Raw Materials Differ: Brown fused alumina is made from bauxite, smokeless coal, and iron filings. White fused alumina, on the other hand, is derived from aluminum oxide powder.
2. Applications Differ: Brown fused alumina is used in the manufacture of ceramics, resin-bonded high strength abrasive tools, and for grinding, polishing, sandblasting, precision casting, and can also be used to produce high-grade refractory materials. White fused alumina, on the other hand, is suitable for grinding high-carbon steel, high-speed steel, and stainless steel with fine particle abrasives, and can also be used in precision casting and high-grade refractory materials.
3. Aluminum Oxide Content Variations: Brown fused aluminum oxide contains 94% to 75% aluminum oxide. White fused aluminum oxide has an aluminum oxide content greater than 99.2%.
4. Hardness Variations: The former has a hardness of 8.9 and is suitable for removing burrs and sharp edges from surface parts of stainless steel, carbon steel, aluminum alloy, and other metal components. The latter, with a hardness of 9.0, offers strong cutting power and is used for removing burrs and sharp edges from both metal and non-metallic materials. It also has a polishing effect on the surface of parts, classifying it as a medium-grade polishing abrasive.
In addition to the aforementioned points, the visible difference between brown corundum and white corundum is their color. The former typically ranges from brown-black to brown-red, whereas the latter is usually white.
