Silicon Carbide Powder

Silicon carbide powder is commonly utilized as an abrasive-machining material in processes like grinding, honing and water jet cutting. Additionally, its hardness also allows it to function effectively as support material for high heat duty kilns used for ceramic or glass fusing firing operations.

Though SiC is found naturally in small amounts in corundum deposits and meteorites (and often referred to by jewelers as moissanite), most SiC produced synthetically is made using the Lely method and cut into gems.


Black silicon carbide powder is an extremely versatile abrasive material used for many industrial purposes. It is frequently utilized in sandblasting to remove paint, rust and other coatings from surfaces as well as grinding and polishing metals and ceramic materials; furthermore it’s useful in producing sandpaper and abrasive cloth products.

Due to its hardness and rigidity, carbide is an excellent material for manufacturing cutting tools such as saw blades and drill bits. It is often chosen for cutting nonferrous metals as well as hard materials like glass or ceramics; even cutting through some types of metal such as stainless steel may be possible!

Sharp and hard abrasive grains make aluminum oxide abrasives an excellent choice for cutting glass, plastics and medium-density fiberboard with light to moderate pressure. Unfortunately, they’re not as durable and require frequent changes of media.

Silicon carbide’s combination of hardness, stiffness, thermal conductivity, and thermal expansion coefficient make it an invaluable material for space technology applications. Solar panels made from polycrystalline SiC are capable of withstanding outer space’s hostile conditions like radiation levels and temperature extremes while its low density, hardness, and rigidity makes it suitable as mirror material in astronomical telescopes.

Heat Resistant

Silicon carbide boasts a Mohs hardness rating of 9, making it one of the hardest synthetic materials known. Used in products like grinding wheels and abrasive papers and cloth, its strength and fracture characteristics make it useful in applications such as sandblasting, grinding and water-jet cutting; its thermal conductivity falls between metals and insulators materials and its chemical resistance at elevated temperatures is impressive.

Sintered SiC (SiC) is the most prevalent form of silicon carbide produced through self-bonding processes known as sintering in high temperature furnaces, including recrystallization, hot pressing, reaction sintering and microwave sintering. Sintering produces material with excellent strength, heat resistance and chemical purity characteristics.

Reaction bonding of silicon carbide involves mixing SiC powder with a binder such as powdered carbon and plasticizer, then molding into desired shapes before burning off plasticizer, heating in a reducing atmosphere, and infiltrating with liquid silicon to form dense masses of silicon carbide. This method produces SiC with lower temperature strength but higher thermal expansion; yet is more economical than sintering.

Black silicon carbide can also be found in refractories, metal matrix composites and kiln furniture. Furthermore, its versatility extends to refinishing Naniwa water stones that have sustained deep scratches or other forms of damage as it adds additional grit that helps repair their surfaces and restore them back to pristine condition.

High Temperature Resistant

Silicon carbide’s exceptionally hard and strong nature makes it a key component for use in various abrasive and cutting applications, including sandblasting, grinding, water-jet cutting and precision lapping and polishing applications. Furthermore, silicon carbide’s high temperature resistance enables its use in structural materials like car brake discs and bulletproof vests; additionally it’s used in refractory linings and heating elements in industrial furnaces.

SiC is often used in electronic components that require high breakdown electric fields with lower switching energies, such as thermistors and varistors, due to its wide band gap which enables greater band gap shifting closer to conduction bands than silicon.

Silicon carbide naturally occurs as the rare mineral moissanite; however, most industrial silicon carbide is synthetically manufactured through reacting silica sand with carbon in a high temperature reaction furnace to form crystalline silicon carbide powder which can then be used in various applications, including manufacturing cutting tools and abrasives as well as producing bulletproof vests, composite armor components and wear-resistant parts for pumps and rocket engines – not forgetting refractory linings of industrial furnaces.

Black silicon carbide features more uniform particle grading and shape for faster cutting rates and consistent finishes, often used in bonded abrasives such as wheels and discs, coated abrasives, pressure blasting applications or pressure blasting nozzles. Furthermore, this material can also be found in furnace linings or metal-matrix composites.

Chemical Resistant

Silicon carbide offers excellent corrosion resistance properties and makes a suitable material for parts that require high wear resistance, high temperature strength and chemical resistance. It is non-reactive with most acids (hydrochloric, sulfuric and hydrofluoric acids), bases, salts and oxidizing agents; however, at temperatures exceeding 850degC chlorine can react with it to form SiC(O)2.

Extremely hard ceramic material such as cordierite is often chosen for grinding and polishing abrasives, cutting tools, water jet cutting equipment and sandblasting equipment. Furthermore, cordierite can serve as shelving material when firing ceramics or glass into high temperature kilns.

Comparable with other advanced ceramics, silicon carbide offers exceptional oxidation resistance and strength retention at elevated temperatures. Due to its ability to resist chemical attack at high temperatures, silicon carbide has become one of the premier materials for wafer tray supports and paddles used in semiconductor furnaces as well as varistors and thermistors.

Washington Mills offers CARBOREX(R) silicon carbide powder in various chemistries and sizes to suit a range of applications such as Abrasive Blasting, Coated Abrasives, Ceramics, Glass, Metal Casting, Filtration, Refractories, Wiresawing and Wear-Resistance. Connect with us today to discover more of this impressive ceramic material’s possibilities!

Scroll to Top