Silīcija karbīda lietojums

Silicon carbide, commonly referred to as carborundum /karb@rndu/, is an extremely hard synthetic crystalline compound of silicon and carbon that has long been utilized for use as an abrasive and wear-resistant material in various fields such as refractories and ceramics, wear resistant parts production, light emitting diode substrate production and semiconductor substrate substrate for light emitting diodes (LEDs). Since the late 19th century it has also served as a semiconductor substrate in light emitting diodes (LED).

Power electronics that operate at high temperatures and voltages also rely on this material for reliable operation.

High-performance brake discs

Silicon carbide (SiC), commonly referred to as carborundum since 1891, has become widely produced since being discovered and put into mass-production. Used primarily in applications requiring extreme durability such as automobile brakes and clutches as well as bulletproof vest plates containing ceramic plates made from this compound ranks 9 on Mohs scale of hardness – second only to diamond among natural substances.

SiC is relatively easy to machine and fabricate, which makes it a popular choice for components that will come into contact with high temperatures, such as brake discs. Because their frictional surfaces may reach temperatures that would melt steel or damage other materials, many braking systems employ vented discs with multiple holes or slots designed to release gases generated when their frictional surface heats up.

SiC is produced by various manufacturers for use in abrasives, metallurgical and refractory industries. Edward Acheson pioneered an efficient method for creating this material back in 1891 – placing pure silica sand with ground coke carbon into an electrically heated furnace and then running an electrical current through it causes chemical reactions that produce small crystals of SiC that are ground into powder form for commercial usage.

Bulletproof armor

Silicon Carbide (SiC), is an ultrahard synthetically produced crystalline compound composed of silicon and carbon, only exceeded in hardness by Boron Carbide and Diamond on the Mohs scale. Since the late 19th century it has been utilized in wear-resistant components like grinding wheels, cutting tools and sandpaper due to its hardness and other desirable properties. Furthermore it can be found as part of refractory materials, ceramics or even semiconducting substrates for light emitting diodes (LED).

Edward Acheson first artificially produced moissanite around 1891 when he made an unexpected discovery of small black crystals during a process of heating carbon and alumina mixtures, leading him to create the Acheson process and commercial production. Its natural counterpart can only be found in meteorites or certain refractory materials.

SiC is composed of close-packed layers joined together via covalent bonds. Each of these layers contain two primary coordination tetrahedra consisting of four silicon and four carbon atoms arranged in various arrangements to form different polytypes of SiC; these structures offer extreme hardness with individual physical properties that vary considerably.

SiC is an ideal material for components subject to extreme loads and temperature extremes, including pump bearings, valves, sandblasting injectors, shaft sealing applications at high speeds as well as mirrors in large astronomical telescopes due to its combination of strength, rigidity, thermal conductivity and low thermal expansion properties. As a result of these characteristics it’s often employed in engineering applications requiring components with these characteristics such as pump bearings. valves sandblasting injectors as well as shaft sealing at high speeds..

Semiconductor materials

Silicon carbide has seen an extraordinary surge in popularity due to increased power electronics demand. Its combination of physical and electronic properties make it ideal for producing higher breakdown electric fields, lower switching losses, and greater energy efficiency.

Silicon carbide, though normally an insulator, can be transformed into a semiconductor by doping with certain impurities. When doped with aluminum, boron, gallium or nitrogen dopants (P-type semiconductor), silicon carbide behaves as an N-type semiconductor; when doped with phosphorus dopants it acts as an N-type semiconductor. Doping agents affect electron mobility in terms of band structure – electrons move along conduction bands while holes travel valence bands.

SiC is known for having an exceptionally wide band gap, enabling it to achieve much higher breakdown electric fields than conventional silicon. This leads to reduced switching losses and smaller component usage resulting in greater energy efficiency; something especially valuable in electric vehicle power conversion systems which need to withstand higher voltages and temperatures.

Silicon carbide can also be utilized in composite materials, such as carbon fiber-reinforced silicon carbide (CFRC), to produce strong yet lightweight structures that withstand extreme temperatures and stresses, such as those experienced during braking. Furthermore, silicon carbide serves as a component in bulletproof armor such as Chobham armour as it can withstand high-velocity impacts.

Energy storage

Silicon carbide (SiC), commonly referred to as carborundum, is an extremely strong and sharp material with the highest tensile strength among all natural materials. Crystallized into tightly packed covalent bonds of 4 silicon and 4 carbon atoms, SiC is highly resistant to inorganic acids, salts, and alkalis while possessing one of the highest tensile strengths available today.

Moissanite, which naturally exists as the rare mineral moissanite, has been mass produced as powder form since 1907 to serve various uses such as grinding wheels abrasives and hard ceramic applications such as car brakes and clutches as well as bulletproof vest ceramic plates. Since 1907 it has also been employed in electronic applications like light emitting diodes (LED) and detectors.

Pure SiC is an electrical insulator. However, by adding dopants like nitrogen and phosphorus as dopants (dopants are used to modify material properties), dopants allow SiC to act like a semiconductor and help power electronics devices switch between conducting and nonconducting states efficiently in order to generate or consume power efficiently.

SiC semiconductors offer significant improvements over traditional silicon semiconductors when it comes to voltage and current losses, thermal efficiency and size/weight reduction compared to their silicon counterparts. As such, SiC makes for ideal use in inverters and DC/DC converters found in electric vehicles to facilitate DC fast charging while reducing size/weight by cutting essential power electronic component sizes/weight. It can even operate at higher temperatures/frequencies than regular semiconductors!