Silicon carbide ceramic (SiC) is an advanced ceramic material containing silicon and carbon. It occurs in nature as the extremely rare mineral moissanite. Synthetic SiC powder has been mass-produced since 1893 for use as an abrasive. Grains of silicon carbide can be bonded together by sintering to form very hard ceramics.

(1) As an abrasive, it can be used as a grinding tool, such as a grinding wheel, oil stone, grinding head, sand tile, etc. (2) As a metallurgical deoxidizer and high-temperature resistant material. (3) A high-purity single crystal that can be used for manufacturing semiconductors and manufacturing silicon carbide fibers. Further Reading: Applications of Silicon Carbide Ceramics in These 4 Industries

Silicon carbide has been used as an abrasive material since its discovery in 1891. The material is lightweight, has excellent thermal conductivity, and has low thermal expansion. It has very high abrasion resistance and is relatively cheaper when we talk about production. For these reasons, silicon carbide material is often applied as a loose or solid abrasive material in several applications. Silicon carbide abrasives are available in several forms (such as powder, sandpaper, grinding wheel, and etc.) depending on the applications they’re meant for.

Silicon carbide is not only the lightest, but also the hardest ceramic material and has excellent thermal conductivity, low thermal expansion and is very resistant to acids and lyes. Silicon Carbide (SiC) devices belong to the so-called wide band gap semiconductor group. They offer a number of attractive characteristics for high voltage power semiconductors when compared to commonly used silicon (Si). Silicon carbide behaves almost like a diamond. It is toxicologically safe and can be used in the food industry. In particular, the much higher breakdown field strength and thermal conductivity of SiC allow creating devices which outperform by far the corresponding Si ones.

In commercial engineering applications, silicon carbide is produced in different forms. Sintered silicon carbide (SSiC) Nitride bonded silicon carbide (NBSC) Reaction bonded silicon carbide (RBSC) Clay-bonded silicon carbide SiAlON bonded silicon carbide, also known as silicon nitride bonded silicon carbide (NBSC). Chemical-vapor-deposited silicon carbide (CVD) Silicon Carbide. CVD is an extremely pure form of silicon carbide compound.

SiC stands out for its high hardness (comparable to diamonds), excellent thermal conductivity, resistance to thermal shock, chemical inertness, and ability to function under high temperature and high power conditions.

Yes, due to its high hardness and low density, SiC is used in composite armor (e.g., body armor and vehicle armor) for enhanced ballistic protection, effectively stopping high-velocity projectiles.

SiC is considered environmentally friendly due to its durability and the efficiency it brings to energy applications. Its use in power electronics, for example, reduces energy loss and, consequently, emissions in various applications.

Reaction bonded silicon carbide (RBSC) contains free silicon and offers good dimensional stability and cost advantages.

Sintered silicon carbide (SSiC) provides higher purity, higher strength, and better corrosion resistance for demanding applications.

The best choice depends on operating temperature, mechanical requirements, and application environment.