The Difference Between White Alumina And Aluminum Oxide
The chemical name of white corundum is alumina (aluminum oxide (Al2O3) content is more than 99%), a kind of artificial abrasive, which is white, sandy, or powdery, uniform, small particles, with a small amount of floating dust. White corundum is made of high-quality aluminum oxide powder as raw material, which is smelted in an electric arc at a high temperature above 2000 degrees and then cooled.
White corundum abrasives are suitable for the surface beautification of various high-end products, crafts, or hardware products. Fine white corundum can be used as the head of polishing and grinding. It can be used as solid and coated abrasive tools, suitable for processing hardened steel, alloy steel, high-speed steel, high-carbon steel, and other materials with relatively hard hardness and high tensile strength.
The hardness of white corundum is slightly higher than that of brown corundum, and its toughness is lower than that of brown corundum.
When grinding, the abrasive grains are easily broken. Therefore, the grinding heat is small, and it is suitable for the manufacture of fine grinding quenched steel, high carbon steel, high-speed steel, and grinding wheels for thin-walled parts are more expensive than brown corundum.
1. Characteristics of white corundum
1) Uniform particle size, smooth cutting surface, good cutting performance, and fast speed when used in hydraulic cutting;
2) The particles have high purity and fewer impurities, so the cutting environment is good.
3) Good quality, less wear and tear of accessories, and lower cost.
2. Advantages of white corundum products:
1) Does not affect the color of the workpiece;
2) It can be used for sandblasting in the process where iron powder residue is strictly prohibited; the micro powder grade is very suitable for wet sandblasting and polishing operations.3) Fast processing speed and high quality;
4) The amount of iron oxide contained is extremely low, suitable for sandblasting operations where iron residues are strictly prohibited;
5) Go through the pickling step to remove impurities.
3. The difference between white corundum and brown corundum:
The raw material of brown corundum is bauxite, and there are also anthracite and iron oxide. The raw material of white corundum is alumina powder.
1) Different uses: brown corundum can be used to manufacture ceramics, resin high-consolidation abrasives, grinding, polishing, sandblasting, precision casting, etc., and can also be used to manufacture advanced refractory materials. White corundum 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 advanced refractory materials.
2) Different properties: brown corundum has the characteristics of high purity, good crystallization, strong fluidity, low linear expansion coefficient, and corrosion resistance. White corundum has the characteristics of high purity, good self-sharpening, acid and alkali corrosion resistance, high-temperature resistance, and stable thermal performance. In comparison, the hardness of white corundum is higher than that of brown corundum.
3) The composition is different: Although both brown corundum and white corundum contain alumina, the alumina content of white corundum is more than 99%, and the alumina content of brown corundum is about 95%.
4). Different objects of use: white corundum is used by some high-end users, because it has better cutting power and good polishing effect, and is mostly used in carbon steel, alloy steel, malleable cast iron, hard bronze, etc., while brown corundum is the most common in the market It is used in a relatively large amount on the market, and is mostly used for quenched steel, high-speed steel, high-carbon steel, etc.
