1. Кристалографија и материјалне основе силицијум карбида
1.1 Полиморфизам и атомско везивање у СиЦ
(Керамичке плоче од силицијум карбида)
Силицијум карбид (СиЦ) is a covalent ceramic substance made up of silicon and carbon atoms in a 1:1 stoichiometric ratio, identified by its exceptional polymorphism– преко 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), and the hexagonal kinds 4H-SiC and 6H-SiC, each displaying subtle variations in bandgap, electron mobility, and thermal conductivity that affect their suitability for details applications.
The toughness of the Si– C bond, with a bond energy of roughly 318 кЈ/мол, underpins SiC’s remarkable solidity (Mohs solidity of 9– 9.5), high melting factor (~ 2700 ° Ц), and resistance to chemical destruction and thermal shock.
In ceramic plates, 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 Microstructure and Stage Purity in Ceramic Plates
The performance of silicon carbide ceramic plates is critically depending on microstructural features such as grain size, thickness, stage homogeneity, and the existence of additional stages or contaminations.
High-grade plates are usually fabricated from submicron or nanoscale SiC powders with sophisticated sintering methods, causing fine-grained, totally dense microstructures that maximize mechanical toughness and thermal conductivity.
Contaminations such as complimentary carbon, силицијум диоксид (СиО ТВО), 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 (
Адванцед Церамицс основан октобра 17, 2012, је високотехнолошко предузеће посвећено истраживању и развоју, производње, обрада, sales and technical services of ceramic relative materials such as Silicon Carbide Ceramic Plates. Наши производи укључују, али не ограничавајући се на керамичке производе од бор карбида, Керамички производи од бор нитрида, Керамички производи од силицијум карбида, Керамички производи од силицијум нитрида, Керамички производи од цирконијум диоксида, итд. Ако сте заинтересовани, слободно нас контактирајте.
Ознаке: silicon carbide plate,carbide plate,silicon carbide sheet
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