1. Criostal-eòlas agus bunaitean stuthan de Silicon Carbide
1.1 Polymorphism agus Ceangal Atamach ann an SiC
(Plataichean ceirmeach silicon carbide)
Silicon carbide (SiC) Is e stuth ceirmeag covalent a tha air a dhèanamh suas de silicon agus atoman gualain ann an a 1:1 co-mheas stoichiometric, air a chomharrachadh le a polymorphism air leth– thairis 250 polytypes aithnichte– iad uile a’ roinn bannan covalent stiùiridh cruaidh ach ag atharrachadh ann an sreath càrnaidh de luchd-togail Si-C.
Is e aon de na polytypes as iomchaidh 3C-SiC (frèam measgachadh sinc ciùbach), agus na seòrsaichean sia-thaobhach 4H-SiC agus 6H-SiC, gach fear a’ taisbeanadh atharrachaidhean beaga ann an bandgap, gluasad dealain, agus tearmach conductivity a bheir buaidh air an fhreagarrachd airson mion-fhiosrachadh iarrtasan.
Tha cruas an t-Si– C bann, le lùth ceangail timcheall air 318 kJ/mol, underpins SiC’s remarkable solidity (Mohs seasmhachd 9– 9.5), bàillidh leaghaidh àrd (~ 2700 °C), and resistance to chemical destruction and thermal shock.
Ann an ceramic truinnsearan, 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 a rèir 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 agus purrachd ìre ann am pleitean ceirmeag
The performance of silicon carbide ceramic plates is critically depending on microstructural features such as grain size, tiughad, aon-ghnèitheachd àrd-ùrlar, and the existence of additional stages or contaminations.
High-grade plates are usually fabricated from submicron or nanoscale SiC powders with sophisticated sintering methods, ag adhbhrachadh mìn-ghràin, totally dense microstructures that maximize mechanical toughness and thermal conductivity.
Contaminations such as complimentary carbon, silidh (SiO DÀ), 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 (
Adhartach Ceramics air a stèidheachadh air an Dàmhair 17, 2012, na iomairt àrd-theicnigeach a tha dealasach a thaobh rannsachadh agus leasachadh, cinneasachadh, giollachd, reic agus seirbheisean teignigeach de stuthan càirdeil ceirmeag leithid Silicon Carbide Ceramic Plates. Tha na toraidhean againn a’ toirt a-steach ach gun a bhith cuibhrichte gu Boron Carbide Ceramic Products, Bathar Ceramic Boron Nitride, Toraidhean ceirmeach silicon carbide, Toraidhean ceirmeag Silicon Nitride, Toraidhean ceirmeag Zirconium dà-ogsaid, etc. Ma tha ùidh agad, na bi leisg fios a chuir thugainn.
Tagaichean: plàta silicon carbide,truinnsear carbide,duilleag de silicon carbide
Tha a h-uile artaigil agus dealbh bhon eadar-lìn. Ma tha cùisean dlighe-sgrìobhaidh sam bith ann, feuch an cuir thu fios thugainn ann an àm airson cuir às.
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