Nkag siab lub neej yav dhau los ntawm silicon carbide!

Silicon carbide (SiC) yog smelted ntawm qhov kub thiab txias nyob rau hauv lub qhov cub tsis kam siv quartz xuab zeb, roj av coke (los yog coke coke), thiab ntoo chips ua raw khoom. Silicon carbide kuj muaj nyob rau hauv cov xwm li ib tug tsawg mineral, moissanite. Silicon carbide tseem hu ua moissanite. Ntawm cov niaj hnub non-oxide high-tech refractory raw cov ntaub ntawv xws li C, N, thiab B, silicon carbide yog siv dav tshaj plaws thiab kev lag luam. Nws tuaj yeem hu ua emery xuab zeb lossis refractory xuab zeb.

1. Lub neej yav dhau los thiab tam sim no ntawm silicon carbide
Vim nws cov khoom ruaj khov, thermal conductivity, me me thermal expansion coefficient, thiab zoo hnav tsis kam, silicon carbide muaj ntau lwm yam siv dua li siv los ua abrasive, xws li txheej silicon carbide hmoov nrog txheej txheem tshwj xeeb ntawm sab hauv phab ntsa. turbine impeller los yog lub tog raj kheej thaiv, nws tuaj yeem txhim kho nws qhov hnav tsis kam thiab txuas ntxiv nws lub neej kev pab cuam los ntawm 1 mus rau 2 zaug; Cov khoom siv refractory siab heev ua los ntawm nws yog thermal shock resistant, me me, lub teeb nyob rau hauv qhov hnyav, siab zog, thiab muaj zog txuag cov nyhuv. Qib qis silicon carbide (muaj txog 85% SiC) yog ib qho zoo heev deoxidizer. Nws tuaj yeem ua kom ceev steelmaking, pab tswj cov tshuaj muaj pes tsawg leeg, thiab txhim kho cov hlau zoo. Tsis tas li ntawd, silicon carbide kuj tau siv dav hauv kev tsim cov silicon carbide rods rau hluav taws xob cua sov ntsiab lus.
Silicon carbide nyuaj heev, nrog Mohs hardness ntawm 9.5, thib ob tsuas yog lub ntiaj teb cov pob zeb nyuaj tshaj plaws (qib 10). Nws muaj cov thermal conductivity zoo heev, yog semiconductor, thiab tuaj yeem tiv taus oxidation ntawm qhov kub thiab txias.

2. Cov yam ntxwv zoo ntawm cov khoom siv silicon carbide
Silicon carbide (SiC) yog tam sim no cov khoom lag luam loj tshaj plaws ntawm cov khoom siv semiconductor. Lub teb chaws thoob plaws ntiaj teb muab qhov tseem ceeb rau kev tshawb fawb ntawm SiC thiab tau nqis peev ntau ntawm cov neeg ua haujlwm thiab cov khoom siv hauv kev txhim kho nquag. Tebchaws Asmeskas, Tebchaws Europe, Nyiv, thiab lwm yam tsis yog Cov Kev Tshawb Fawb Txog Kev Tshawb Fawb tau tsim nyob rau hauv lub tebchaws, thiab qee lub tuam txhab hluav taws xob thoob ntiaj teb kuj tau nqis peev ntau hauv kev tsim cov khoom siv silicon carbide semiconductor.
Piv nrog cov silicon zoo tib yam, cov khoom siv silicon carbide muaj cov yam ntxwv hauv qab no:

High-voltage yam ntxwv:
Silicon carbide pab kiag li lawm yog 10 npaug ntawm qhov voltage kuj ntawm cov khoom siv silicon sib npaug.
Qhov voltage kuj ntawm silicon carbide Schottky hlab tuaj yeem ncav cuag 2400V.
Silicon carbide field effect tubes tuaj yeem tiv taus qhov hluav taws xob ntawm kaum tawm txhiab tus volts, thiab lawv cov kev tiv thaiv hauv xeev tsis loj heev.

Cov yam ntxwv siab zaus:

Cov yam ntxwv ntawm qhov kub thiab txias:
Niaj hnub no, thaum Si cov ntaub ntawv nyob ze rau theoretical kev ua tau zoo txwv, SiC cov khoom siv hluav taws xob ib txwm raug suav tias yog "cov khoom siv zoo tshaj" thiab tau txais kev cia siab heev vim tias lawv cov hluav taws xob muaj zog, tsis tshua muaj hluav taws xob, kev ua haujlwm siab thiab lwm yam ntxwv. Txawm li cas los xij, piv nrog cov khoom siv Si yav dhau los, qhov sib npaug ntawm kev ua tau zoo thiab tus nqi ntawm SiC cov khoom siv hluav taws xob thiab lawv qhov kev thov rau kev siv tshuab siab yuav dhau los ua tus yuam sij rau seb SiC cov khoom siv hluav taws xob puas tuaj yeem ua tau nrov.

Tam sim no, cov cuab yeej siv hluav taws xob tsawg silicon carbide tau nkag mus rau cov khoom siv tswv yim tsim los ntawm chav kuaj. Tam sim no, tus nqi ntawm silicon carbide wafers tseem yog tus nqi siab, thiab lawv kuj muaj ntau yam tsis xws luag. Los ntawm kev tshawb fawb thiab kev txhim kho tas mus li, nws xav tias cov khoom siv silicon carbide yuav tswj hwm lub zog hluav taws xob ua lag luam nyob ib ncig ntawm 2010. Tab sis qhov no tsis yog li ntawd.

3. Tam sim no txoj kev loj hlob ntawm cov khoom siv silicon carbide yog dab tsi?
1. Cov yam ntxwv tsis zoo: Piv txwv li, Schottky diode voltage nce los ntawm 250 volts mus rau ntau tshaj 1, 000 volts, lub nti cheeb tsam me me, tab sis tam sim no tsuas yog ob peb kaum ntawm amps. Kev khiav hauj lwm kub yog nce mus rau 180 degree, uas yog deb ntawm qhov kev taw qhia ntawm 600 degree. Qhov hluav taws xob poob qis dua qhov tsis txaus siab, nws tsis txawv ntawm cov khoom siv silicon, thiab qhov kev poob siab rau pem hauv ntej yuav tsum ncav cuag 2V.
2. Tus nqi lag luam: kwv yees li 5 mus rau 6 npaug ntawm cov khoom siv silicon tsim.

4. Dab tsi yog qhov nyuaj hauv kev txhim kho ntawm silicon carbide (SiC) cov khoom siv?Qhov teeb meem hauv kev txhim kho cov khoom siv silicon carbide tsis yog lub hauv paus ntsiab lus tsim ntawm cov nti, tshwj xeeb tshaj yog cov qauv qauv tsim. Nws tsis yooj yim los daws nws. Qhov nyuaj yog nyob rau hauv realizing lub manufacturing txheej txheem ntawm lub nti qauv. Piv txwv li no: 1. Micropipe defect ntom ntom ntawm silicon carbide wafers. 2. Cov txheej txheem epitaxial efficiency yog tsawg. 3. Cov txheej txheem doping muaj cov cai tshwj xeeb.

4. Ntau lawm ntawm ohmic kev sib cuag. 5. Kub tsis kam ntawm cov khoom txhawb nqa.

Cov saum toj no tsuas yog ob peb yam piv txwv, tsis yog tag nrho. Tseem muaj ntau cov txheej txheem teeb meem uas tsis muaj cov kev daws teeb meem zoo tshaj plaws, xws li silicon carbide semiconductor nto trenching txheej txheem, cov txheej txheem davhlau ya nyob twg passivation, thiab qhov cuam tshuam ntawm lub xeev ntawm lub rooj vag oxide txheej ntawm kev ruaj ntseg ntev ntawm silicon carbide MOSFET li. Kev lag luam puas tseem tau txais kev pom zoo? Cov lus xaus zoo ib yam, thiab lwm yam, tau cuam tshuam txoj kev loj hlob sai ntawm cov khoom siv hluav taws xob silicon carbide.

5. Kev tsim kho txheej txheem ntawm daim ntawv thov tseem ceeb ntawm silicon carbide

Tam sim no, lub cim thib peb ntawm cov khoom siv semiconductor ua rau muaj kev hloov pauv hauv lub zog huv thiab ib tiam tshiab ntawm cov ntaub ntawv xov xwm hluav taws xob. Txawm hais tias nws yog teeb pom kev zoo, cov khoom siv hauv tsev, cov khoom siv hluav taws xob siv hluav taws xob, lub zog tshiab tsheb, cov phiajcim ntse, lossis cov khoom siv tub rog, cov khoom siv hluav taws xob ua tau zoo yog cov khoom siv zoo heev. Raws li kev loj hlob ntawm peb tiam semiconductors, nws cov kev siv tseem ceeb yog semiconductor teeb pom kev zoo, lub zog hluav taws xob cov khoom siv, lasers thiab detectors, thiab plaub lwm yam.
1. Semiconductor teeb pom kev zoo
Ntawm plaub daim ntawv thov kev lag luam, semiconductor teeb pom kev lag luam tau tsim qhov nrawm tshaj plaws thiab tau tsim kev lag luam nplai ntawm kaum tawm txhiab daus las.
2. Cov khoom siv hluav taws xob fais fab
Hauv kev lag luam hluav taws xob hluav taws xob, daim ntawv thov dav bandgap semiconductors nyuam qhuav pib, thiab kev lag luam loj tsuas yog ob peb puas lab US las. Nws daim ntawv thov feem ntau yog tsom rau hauv kev ua tub rog cov cuab yeej txiav-ntug thiab maj mam nthuav dav mus rau pej xeem.
3. Lasers thiab ntes
Nyob rau hauv daim ntawv thov ntawm laser thiab ntes, GaN-raws li lasers tuaj yeem npog ntau yam spectrum thiab paub txog kev tsim cov xiav, ntsuab, thiab ultraviolet lasers thiab ultraviolet nrhiav.
4. Lwm yam kev siv
Hauv kev tshawb fawb txog kev tshawb fawb, dav bandgap semiconductors tuaj yeem siv rau hauv lub hnub ci hlwb, biosensors, dej-based hydrogen ntau lawm xov xwm, thiab lwm yam kev siv tshiab. Tam sim no, cov cheeb tsam kub no tseem nyob hauv chav kuaj tshawb fawb thiab txhim kho theem.