1. Raw materials: The raw materials of brown corundum are anthracite, iron filings and bauxite. The raw material of white corundum is alumina powder.
2. Color: white corundum has higher alumina content than brown corundum, so white corundum abrasive is white, while brown corundum abrasive is brown black.
3. Different contents: both brown and white corundum contain alumina, but the alumina content of white corundum is more than 99, and the content of brown corundum is about 95.
4. Hardness: the hardness of white corundum is slightly higher than that of brown corundum. White corundum abrasive is a crystalline compound with good hardness and toughness, fine crystal size and good wear resistance, but the production cost is high and the output is low. Brown corundum abrasive has medium hardness, weak grinding effect and relatively low price.
5. Performance: Brown corundum has the characteristics of high purity, good crystallinity, strong fluidity, low linear expansion coefficient and corrosion resistance. White corundum has the characteristics of high purity, good self-polishing, acid and alkali corrosion resistance, high temperature resistance and stable thermal performance. In contrast, the hardness of white corundum is higher than that of brown corundum.