Niaj hnub nimno C, N, B thiab lwm yam uas tsis yog-oxide high-tech refractory raw cov ntaub ntawv, atmospheric siab sintered silicon carbide yog dav, kev lag luam, tuaj yeem hais tias yog emery lossis refractory xuab zeb. Ntshiab silicon carbide yog xim tsis muaj pob tshab siv lead ua. Yog li dab tsi yog cov khoom siv thiab cov yam ntxwv ntawm silicon carbide?
Sintered silicon carbide nyob rau hauv atmospheric siab
Cov khoom siv ntawm atmospheric siab sintered silicon carbide:
Lub atmospheric siab sintered silicon carbide siv nyob rau hauv kev lag luam yog lub teeb daj, ntsuab, xiav thiab dub raws li hom thiab cov ntsiab lus ntawm impurities, thiab purity yog txawv thiab cov pob tshab yog txawv. Cov qauv siv lead ua silicon carbide tau muab faib ua rau lo lus lossis pob zeb diamond zoo li plutonium thiab cubic plutonium-sic. Plutonium-sic tsim ntau yam deformation vim qhov sib txawv stacking kev txiav txim ntawm carbon thiab silicon atoms nyob rau hauv lub siv lead ua qauv, thiab ntau tshaj 70 hom deformation tau pom. beta-SIC hloov mus rau alpha-SIC siab tshaj 2100. Cov txheej txheem kev lag luam ntawm silicon carbide yog refined nrog zoo quartz xuab zeb thiab roj av coke nyob rau hauv lub cub tawg. Refined silicon carbide blocks yog crushed, acid-base tu, sib nqus sib nqus, kev tshuaj ntsuam los yog dej xaiv los tsim ntau yam khoom me me.
Cov yam ntxwv ntawm atmospheric siab sintered silicon carbide:
Silicon carbide muaj kev ruaj ntseg zoo, thermal conductivity, thermal expansion coefficient, hnav tsis kam, yog li ntxiv rau kev siv abrasive, muaj ntau yam kev siv: Piv txwv li, silicon carbide hmoov yog coated rau sab hauv phab ntsa ntawm lub turbine impeller los yog lub tog raj kheej thaiv. txheej txheem tshwj xeeb, uas tuaj yeem txhim kho qhov hnav tsis kam thiab txuas lub neej ntawm 1 mus rau 2 zaug. Ua los ntawm tshav kub-resistant, me me, lub teeb yuag, siab zog ntawm high-qib refractory cov ntaub ntawv, lub zog efficiency yog zoo heev. Tsawg-qib silicon carbide (xws li 85% SiC) yog ib qho zoo heev deoxidizer rau nce steelmaking ceev thiab yooj yim tswj cov tshuaj muaj pes tsawg leeg los txhim kho steel zoo. Tsis tas li ntawd, atmospheric siab sintered silicon carbide kuj yog siv dav hauv kev tsim hluav taws xob ntawm silicon carbon rods.
Silicon carbide nyuaj heev. Morse hardness yog 9.5, thib ob tsuas yog lub ntiaj teb nyuaj pob zeb diamond (10), yog ib qho semiconductor nrog thermal conductivity zoo, tuaj yeem tiv taus oxidation ntawm qhov kub thiab txias. Silicon carbide muaj tsawg kawg yog 70 hom crystalline. Plutonium-silicon carbide yog ib qho isomer uas tshwm sim ntawm qhov kub siab tshaj 2000 thiab muaj cov qauv hexagonal crystalline (zoo ib yam li wurtzite). Sintered silicon carbide nyob rau hauv atmospheric siab
Kev siv ntawm silicon carbide hauv kev lag luam semiconductor
Silicon carbide semiconductor kev lag luam saw feem ntau suav nrog silicon carbide high-purity hmoov, ib qho siv lead ua substrate, daim ntawv epitaxial, cov khoom siv hluav taws xob, cov ntim khoom thiab cov ntawv thov dav hlau.
1. Ib leeg siv lead ua substrate Ib leeg siv lead ua substrate yog semiconductor txhawb cov khoom siv, cov khoom siv hluav taws xob thiab kev loj hlob ntawm epitaxial substrate. Tam sim no, txoj kev loj hlob ntawm SiC ib leeg siv lead ua muaj xws li lub cev vapor hloov txoj hauv kev (PVT txoj kev), txoj kev ua kua theem (LPE txoj kev), thiab kub kub tshuaj vapor deposition txoj kev (HTCVD txoj kev). Sintered silicon carbide nyob rau hauv atmospheric siab
2. Epitaxial sheet Silicon carbide epitaxial sheet, silicon carbide sheet, ib leeg siv lead ua zaj duab xis (epitaxial txheej) nrog cov kev taw qhia tib yam li cov substrate siv lead ua uas muaj qee yam kev cai rau silicon carbide substrate. Nyob rau hauv cov ntaub ntawv siv, dav band gap semiconductor li yuav luag tag nrho cov tsim nyob rau hauv epitaxial txheej, thiab silicon nti nws tus kheej tsuas yog siv raws li lub substrate, nrog rau cov substrate ntawm GaN epitaxial txheej.
3. High-purity silicon carbide hmoov High-purity silicon carbide hmoov yog cov khoom siv raw rau kev loj hlob ntawm silicon carbide ib leeg siv lead ua los ntawm PVT txoj kev, thiab purity ntawm cov khoom ncaj qha cuam tshuam rau kev loj hlob zoo thiab hluav taws xob cov yam ntxwv ntawm silicon carbide ib leeg siv lead ua.
4. Cov khoom siv hluav taws xob yog lub zog dav dav ua los ntawm cov khoom siv silicon carbide, uas muaj cov yam ntxwv ntawm qhov kub thiab txias, siab zaus thiab kev ua haujlwm siab. Raws li daim ntawv ua haujlwm ntawm cov cuab yeej, SiC cov khoom siv hluav taws xob feem ntau suav nrog lub zog diode thiab lub hwj chim hloov raj.
5. Terminal Nyob rau hauv peb-tiam semiconductor daim ntaub ntawv, silicon carbide semiconductors muaj qhov zoo ntawm kev complementary rau gallium nitride semiconductors. Vim muaj kev hloov pauv siab, cov yam ntxwv cua sov qis, lub teeb yuag thiab lwm yam zoo ntawm SiC cov khoom siv, qhov kev thov ntawm kev lag luam hauv qab txuas ntxiv nce ntxiv, thiab muaj qhov sib txawv los hloov SiO2 li.
Post lub sij hawm: Jun-16-2023