What are the differences and distinctions in physical properties between brown corundum, white corundum, black silicon carbide, and green silicon carbide

There are significant differences in physical properties between brown corundum, white corundum, black silicon carbide, and green silicon carbide. ‌

Brown corundum has higher toughness than white corundum, but its self sharpness is not as good as white corundum. Its basic performance and high toughness make it suitable for use in polishing pads, rough grinding wheels, polishing coated grinding tools, etc. Brown corundum has broad prospects when combined with zirconia corundum to produce high-end grinding tools. By calcination at a certain temperature, the hydrophilicity and strength of brown corundum can be enhanced, the coefficient of thermal expansion can be reduced, and the service life and performance of grinding tool products can be improved. ‌

White corundum has high hardness, good high-temperature resistance, and is sharper and has good self sharpening properties. White corundum is specially used in fields such as paint coatings, engineering ceramics, and precision casting. It has high purity and is mainly composed of aluminum trioxide, hence it is also known as white alumina 23. ‌

The hardness of black silicon carbide is higher than that of corundum, but its toughness is lower, and it is brittle and sharp. The main component of black silicon carbide is alpha SiC, and the abrasive is black, opaque hexagonal crystals with a glassy luster. It is mainly used for producing grinding tools for marble, concrete, and cement polishing, and can also be used for producing water sandpaper, removing paint surfaces, cleaning grinding wheels for removing welding points, etc. ‌

The hardness of green silicon carbide is higher than that of black silicon carbide, and the grinding efficiency is also higher. Green silicon carbide is mainly used in grinding tools for granite, ceramics, glass, and ceramic tile finishing. It is also suitable for producing multifunctional grinding wheels, bearing steel oilstones, precision grinding oilstones, PVC grinding wheels, and other products. Due to the fact that green silicon carbide is a hard abrasive in non superhard grinding tools, it is often added to diamond grinding tools to reduce costs and provide filling. ‌

In summary, brown corundum is suitable for various abrasive products due to its high toughness and good basic properties, white corundum is suitable for precision casting and engineering ceramics due to its high hardness and good self sharpening, black silicon carbide is suitable for polishing materials such as cement and concrete due to its high hardness and brittleness, and green silicon carbide is suitable for more advanced abrasive products and production processes due to its higher hardness and grinding efficiency. ‌