Carborundum - Hexagonal crystals

Silicon carbide, formed by the reaction of silicon dioxide from clay with carbon at high temperatures.

Silicon carbide, ranking fourth in inorganic materials in terms of hardness, is only surpassed by diamond, boron carbide, and cubic boron nitride. High-density silicon carbide can now be produced through hot-press sintering. It boasts high strength and excellent oxidation resistance, remains shape-retentive at high temperatures, and can serve as turbine blades for high-temperature gas turbines, as wear-resistant sealing materials, and as nozzles for rocket exhaust cones and lightweight bulletproof products.

Carborundum, also known as pure, is a colorless crystal. It has a high density and hardness, approximately Mohs 9.5. It is generally found in colorless, powdery granules. Once crushed, it can be used as abrasive powder, for making polishing paper, and for creating the friction surfaces of grinding wheels and whetstones. It is produced by placing sand and an appropriate amount of carbon in an electric furnace and subjecting it to intense heat.

Natural carborundum, also known as garnet, is a silicate mineral. It is processed into abrasive material through methods such as hydraulic sorting, mechanical processing, and screening. Its production and usage have a long history, with records of its use in grinding crystal glass and various jade stones in ancient China. In the 1940s, it was also exported to the East.

Carborundum Classification

The products are divided into three categories: coarse, medium, and fine. The coarse ones are black and red, the medium ones are light red, and the fine ones are red and white. The particle sizes are uniformly distributed, with uniform particle shapes, forming sharp-edged, angular crystals, featuring sharp edges and high abrasive power.

Supplies industrial grinding services for marble and other soft materials.

Glass industry products including grinding glass burrs, television picture tubes, optical instruments, lenses, prisms, and glass for watches.

Metal industrial shot blasting, rust removal, and polishing. Printing industry polishing of printing plates, as well as light industry processing of plastic samples, leather, sandpaper, and more.

Natural silicon carbide has slightly lower grinding power than electric furnace white corundum, but it boasts strong toughness and the characteristic of shell-like fracture surfaces. Its advantages include high surface finish of the ground parts, fewer and less prominent sand scratches. The fine and even grinding surface can enhance product quality, which is a unique feature of this product. Natural silicon carbide offers short grinding time, high efficiency, and low cost, which can compensate for its shorter lifespan.