Cov qauv khoom siv thiab cov khoom ntawm sintered silicon carbide nyob rau hauv atmospheric siab

Niaj hnub nimno C, N, B thiab lwm yam khoom siv refractory uas tsis yog oxide high-tech, atmospheric pressure sintered silicon carbide yog dav, economic, tuaj yeem hais tias yog emery lossis refractory xuab zeb. Silicon carbide ntshiab yog xim tsis muaj pob tshab siv lead ua. Yog li cov qauv khoom thiab cov yam ntxwv ntawm silicon carbide yog dab tsi?

Sintered silicon carbide nyob rau hauv atmospheric siab

Cov qauv khoom siv ntawm atmospheric pressure sintered silicon carbide:

Lub zog atmospheric sintered silicon carbide siv hauv kev lag luam yog daj daj, ntsuab, xiav thiab dub raws li hom thiab cov ntsiab lus ntawm cov khoom tsis huv, thiab qhov huv yog txawv thiab qhov pom tseeb yog txawv. Cov qauv siv lead ua silicon carbide muab faib ua rau lo lus lossis pob zeb diamond plutonium thiab cubic plutonium-sic. Plutonium-sic tsim ntau yam kev hloov pauv vim muaj qhov sib txawv ntawm cov pa roj carbon thiab silicon atoms hauv cov qauv siv lead ua, thiab ntau dua 70 hom kev hloov pauv tau pom. beta-SIC hloov mus rau alpha-SIC saum 2100. Cov txheej txheem kev lag luam ntawm silicon carbide yog refined nrog cov xuab zeb quartz zoo thiab roj av coke hauv lub cub tawg tiv taus. Refined silicon carbide blocks raug crushed, acid-base ntxuav, sib cais sib nqus, tshuaj ntsuam lossis xaiv dej los tsim ntau yam khoom me me.

Cov yam ntxwv ntawm cov khoom siv ntawm atmospheric pressure sintered silicon carbide:

Silicon carbide muaj kev ruaj khov tshuaj zoo, thermal conductivity, thermal expansion coefficient, hnav tsis kam, yog li ntxiv rau kev siv abrasive, muaj ntau yam kev siv: Piv txwv li, cov hmoov silicon carbide yog coated rau ntawm phab ntsa sab hauv ntawm lub turbine impeller lossis lub tog raj kheej thaiv nrog cov txheej txheem tshwj xeeb, uas tuaj yeem txhim kho kev hnav tsis kam thiab ntev lub neej ntawm 1 txog 2 zaug. Ua los ntawm cov khoom siv refractory qib siab, tiv taus cua sov, me me, lub teeb yuag, lub zog siab, kev siv hluav taws xob zoo heev. Silicon carbide qib qis (suav nrog kwv yees li 85% SiC) yog ib qho deoxidizer zoo heev rau kev ua kom ceev steelmaking thiab yooj yim tswj cov tshuaj lom neeg sib xyaw kom txhim kho cov hlau zoo. Tsis tas li ntawd, atmospheric siab sintered silicon carbide kuj tseem siv dav hauv kev tsim cov khoom siv hluav taws xob ntawm silicon carbon rods.

Silicon carbide nyuaj heev. Morse hardness yog 9.5, thib ob tsuas yog lub ntiaj teb lub pob zeb diamond nyuaj (10), yog ib lub semiconductor nrog kev ua haujlwm thermal zoo heev, tuaj yeem tiv taus oxidation ntawm qhov kub siab. Silicon carbide muaj tsawg kawg 70 hom crystalline. Plutonium-silicon carbide yog ib qho isomer uas tsim ntawm qhov kub siab tshaj 2000 thiab muaj cov qauv crystalline hexagonal (zoo ib yam li wurtzite). Sintered silicon carbide nyob rau hauv atmospheric siab

Daim ntawv thov ntawm silicon carbide hauv kev lag luam semiconductor

Cov saw hlau kev lag luam semiconductor silicon carbide feem ntau suav nrog silicon carbide hmoov purity siab, ib qho siv lead ua substrate, epitaxial sheet, cov khoom siv fais fab, cov khoom ntim module thiab cov ntawv thov davhlau ya nyob twg.

1. Ib lub substrate siv lead ua ib lub substrate siv lead ua ib lub substrate yog cov khoom siv txhawb nqa semiconductor, cov khoom siv conductive thiab epitaxial kev loj hlob substrate. Tam sim no, cov txheej txheem kev loj hlob ntawm SiC ib lub substrate suav nrog txoj kev hloov pauv lub cev vapor (PVT txoj kev), cov kua theem txoj kev (LPE txoj kev), thiab cov tshuaj lom neeg kub siab vapor deposition txoj kev (HTCVD txoj kev). Sintered silicon carbide nyob rau hauv atmospheric siab

2. Daim ntawv Epitaxial Silicon carbide epitaxial daim ntawv, silicon carbide daim ntawv, ib zaj duab xis siv lead ua ke (epitaxial txheej) nrog tib qho kev taw qhia li lub substrate siv lead ua ke uas muaj qee qhov yuav tsum tau ua rau silicon carbide substrate. Hauv kev siv ua haujlwm, cov khoom siv semiconductor dav dav yog yuav luag txhua yam tsim tawm hauv txheej epitaxial, thiab cov silicon chip nws tus kheej tsuas yog siv ua lub substrate, suav nrog lub substrate ntawm GaN epitaxial txheej.

3. Cov hmoov silicon carbide uas muaj purity siab Cov hmoov silicon carbide uas muaj purity siab yog cov khoom siv raw rau kev loj hlob ntawm silicon carbide ib leeg siv lead ua los ntawm PVT txoj kev, thiab qhov purity ntawm cov khoom ncaj qha cuam tshuam rau qhov zoo ntawm kev loj hlob thiab cov yam ntxwv hluav taws xob ntawm silicon carbide ib leeg siv lead ua.

4. Lub cuab yeej fais fab yog lub zog dav dav ua los ntawm cov khoom siv silicon carbide, uas muaj cov yam ntxwv ntawm qhov kub siab, zaus siab thiab ua haujlwm tau zoo. Raws li daim ntawv ua haujlwm ntawm lub cuab yeej, lub cuab yeej fais fab SiC feem ntau suav nrog lub zog diode thiab lub raj hloov fais fab.

5. Qhov Kawg Hauv cov ntawv thov semiconductor tiam thib peb, silicon carbide semiconductors muaj qhov zoo ntawm kev ua tiav rau gallium nitride semiconductors. Vim yog qhov ua tau zoo ntawm kev hloov pauv siab, cov yam ntxwv tsis kub, lub teeb yuag thiab lwm yam zoo ntawm SiC cov khoom siv, qhov kev thov ntawm kev lag luam downstream txuas ntxiv mus nce, thiab muaj kev hloov pauv los hloov SiO2 cov khoom siv.