1. Kristallfræði og grunnatriði kísilkarbíðs
1.1 Polymorphism og atómbinding í SiC
(Kísilkarbíð keramikplötur)
Kísilkarbíð (SiC) is a covalent ceramic substance made up of silicon and carbon atoms in a 1:1 stoichiometric ratio, identified by its exceptional polymorphism– yfir 250 known polytypes– all sharing solid directional covalent bonds but varying in piling series of Si-C bilayers.
One of the most highly appropriate polytypes are 3C-SiC (cubic zinc blende framework), og sexhyrndu tegundirnar 4H-SiC og 6H-SiC, each displaying subtle variations in bandgap, electron mobility, and thermal conductivity that affect their suitability for details applications.
Hörku Si– C skuldabréf, with a bond energy of roughly 318 kJ/mól, underpins SiC’s remarkable solidity (Mohs styrkleiki 9– 9.5), hár bræðslustuðull (~ 2700 °C), and resistance to chemical destruction and thermal shock.
Í keramikplötum, the polytype is commonly selected based upon the intended usage: 6H-SiC prevails in architectural applications as a result of its convenience of synthesis, while 4H-SiC controls in high-power electronics for its superior fee provider wheelchair.
The broad bandgap (2.9– 3.3 eV depending on polytype) additionally makes SiC an exceptional electric insulator in its pure type, though it can be doped to function as a semiconductor in specialized digital tools.
1.2 Örbygging og stigi hreinleiki í keramikplötum
The performance of silicon carbide ceramic plates is critically depending on microstructural features such as grain size, þykkt, stigs einsleitni, and the existence of additional stages or contaminations.
High-grade plates are usually fabricated from submicron or nanoscale SiC powders with sophisticated sintering methods, veldur fínkorna, totally dense microstructures that maximize mechanical toughness and thermal conductivity.
Contaminations such as complimentary carbon, kísil (SiO TVEIR), or sintering help like boron or light weight aluminum have to be thoroughly regulated, as they can form intergranular films that lower high-temperature stamina and oxidation resistance.
Recurring porosity, also at reduced degrees (
Advanced Ceramics stofnað í október 17, 2012, er hátæknifyrirtæki sem skuldbindur sig til rannsókna og þróunar, framleiðslu, vinnslu, sölu og tækniþjónusta á keramikefnum eins og kísilkarbíð keramikplötum. Vörur okkar innihalda en takmarkast ekki við bórkarbíð keramikvörur, Bórnítríð keramikvörur, Kísilkarbíð keramikvörur, Silicon Nitride Keramik vörur, Sirkoníumdíoxíð keramikvörur, o.s.frv. Ef þú hefur áhuga, vinsamlegast ekki hika við að hafa samband við okkur.
Merki: kísilkarbíðplata,karbíðplata,kísilkarbíðplötu
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