Silicon carbide glass is an nonoxide ceramic with exceptional resistance to oxidation, strength at elevated temperatures, thermal shock resistance and good thermal conductivity properties. Silicon carbide glass finds numerous applications across industries: it is often found in hardness abrasives; used in refractories for strength and chemical resistance; electronics for its low thermal expansion/high conductivity properties.
Hårdhet
Silicon Carbide (SiC) is an inorganic chemical compound composed of silicon and carbon bonded together at equal ratio. Found naturally as moissanite mineral, SiC has been mass produced as powder since 1893 for use as an abrasive material. Grains of SiC can also be combined together through sintering to produce very hard ceramics used in applications requiring high resilience such as bulletproof vest plates.
Silicon carbide excels when compared with glass-bonded mica in terms of both its tensile strength and toughness, but has lower elastic modulus (stiffness) and shear strength.
Elasticity refers to a material’s ability to deform under force but return to its original shape when released from it, which is typically measured using the Knoop hardness test, which uses much lower indentation forces than its Vickers predecessor, providing more precise measurement for materials like glass and ceramics.
Density
Silicon Carbide (SiC) is an inorganic semiconductor with wide bandgap properties and high thermal conductivity, found naturally as the rare mineral moissanite; since 1893, SiC powder has also been mass produced as abrasives or bulletproof vest plates.
Applications that utilize SiC require differing properties: thermal stability may be most critical, while surface smoothness or stiffness might be most desired. Understanding your application requirements for SiC is critical in choosing an optimal production process for it.
As a polycrystalline material, SiC is produced through various processes with various crystal structures and densities. Black silicon carbide can be made through high-temperature melting of quartz sand and petroleum coke; its hexagonal crystal structure makes it suitable for blasting applications. Chemical vapor deposition produces more pure SiC with face center cubic crystal structure which can be polished to achieve smoother finishes than either sintered or reaction bonded products.
Termisk konduktivitet
Silicon carbide (SiC) is a wide bandgap semiconductor found naturally as moissanite gemstone, as well as mass produced for use as hard abrasives or ceramic plates used in bulletproof vests. SiC is commonly known as carborundum or corundum.
Changes to chemical and phase composition of materials can significantly alter their thermal properties. This was demonstrated through studying monolithic SiOC glass samples with various concentrations of segregated carbon. Phase separation caused by phase separation resulted in reduced coefficient of thermal expansion while increasing thermal conductivity slightly.
Studies revealed that thermal diffusivity of SiOC samples increased with increasing volume fraction of b-SiC, suggesting a percolating path for this phase. As such, this indicates that using an insufficient Maxwell-Garnett model that disregards thermal contact resistance of dispersed particles may not be adequate to describe this material.
Kemisk beständighet
Silicon carbide, more commonly referred to as “carborundum,” offers superior chemical and thermal resistance properties, maintaining its strength even at high temperatures and withstanding rapid heating/cooling cycles, making it the perfect material for wafer tray supports and paddles in semiconductor furnaces. Due to its excellent resistance to oxidation, low coefficient of expansion, thermal shock resistance and good electrical conductivity properties it also serves well in heating elements used in electric furnaces as well as being utilized as heating elements within electric furnaces – its excellent electrical conductivity also allows it being utilized within heating elements that use high voltage variable resistors thermistors (varistors or voltage variable resistors).
Pressureless sintered silicon carbide is almost universally corrosion-resistant and stands up well to all common acids such as hydrochloric, sulfuric, hydrobromic and hydrofluoric acids, bases (such as amines potash and caustic soda) all solvents as well as oxidizing media (including nitric acid). Furthermore, its mechanical properties (high compressive tensile and flexural strengths) and mechanical conductivity values are exceptional; additionally thorium doped nitrides often used to dope porous SiC ceramics exhibit wide electrical conductivity values while mathematical models can predict their porosity-resistivity relationship using mathematical formulae.
Thermal Stability
Silicon carbide glass properties vary significantly depending on its manufacturing process, from strength and stress levels to density and other design parameters. Custom designs may be produced specifically tailored for specific optical applications.
Sic comes in many varieties with differing thermal stability. Ordered mesoporous carbon CMK-1 has higher textural stability than plain mesoporous carbon and lower degradation rate when exposed to higher temperatures.
Understanding the requirements of each application to select an ideal silicon carbide material type is vital when selecting one for use. Applications utilizing optical techniques may prioritize chemical resistance, surface smoothness or stiffness as priority qualities.
Black silicon carbide boasts high hardness and is commonly used for mechanical seals in pumps, semiconductor processing equipment and general industrial machines. Furthermore, its durability allows it to endure high temperatures without degrading in strength – other forms include green and brown silicon carbide which have similar applications.
Lättvikt
Silicon carbide features both low density and high specific stiffness properties, meaning it maintains its shape despite being light weight – ideal for applications such as space telescopes where payload weight plays an integral part.
As it can resist corrosion-causing substances, PEEK makes an ideal material choice for harsh environments where other materials would easily succumb. Furthermore, its excellent thermal conductivity allows it to quickly dissipate optical fiber heat generation – thus ensuring consistent performance without overheating issues.
Producing IKONICS Imaging Abrasives involves several processes. Traditional machining allows users to produce various shapes and sizes while hot press, hot isostatic pressing (HIP), or reaction-bonded sintering can all produce distinct products with unique qualities and characteristics; each offers durability, chemical resistance, mechanical strength, and more! In particular, our Imaging Abrasive does not contain silica and therefore safe to be used within any sandblast cabinet environment.
Swedish 
English