Lub hauv paus ntawm lub cub tawg loj hlob siv lead ua ib leeg yog cov khoom siv tseem ceeb hauv kev tsim cov siv lead ua, thiab nws txoj kev tsim cua sov cuam tshuam ncaj qha rau qhov huv thiab zoo ntawm cov siv lead ua. Raws li lub hauv paus tseem ceeb ntawm lub cub tawg, lub tshav kub graphite siab-purity muaj cov thermal conductivity zoo heev, tiv taus kub siab, thiab ruaj khov tshuaj lom neeg, ua rau nws tswj tau kev ua haujlwm ruaj khov hauv qab kub heev.
Lub tshav kub muaj xws licov cua sov graphite, cov khoom siv graphite, cov thooj voos kheej kheej rwb thaiv tsev, thiab lwm yam khoom. Los ntawm kev tswj hwm qhov kub thiab txias kom meej, nws ua kom muaj kev sib xws thiab sib xws thoob plaws hauv cov txheej txheem loj hlob ntawm cov siv lead ua. Lub tuam txhab tshwj xeeb hauv kev tshawb fawb, kev txhim kho, thiab kev tsim cov teb thermal graphite uas muaj cov khoom siv siab, muab cov kev daws teeb meem thermal rau cov cub tawg loj hlob ib leeg. Nrog cov ntsiab lus carbon ntawm ≥99.9%, cov teb thermal no tau siv dav hauv semiconductors, photovoltaics, thiab lwm yam lag luam, ua tau raws li cov kev cai nruj rau cov siv lead ua uas muaj cov khoom siv siab.
Qhov kev ua tau zoo tshaj plaws ntawm cov graphite thermal fields uas muaj purity siab yog los ntawm lawv cov qauv siv lead ua tshwj xeeb thiab purity siab. Thaum sov chav, cov khoom siv no muaj cov qauv ruaj khov uas cov pa roj carbon atoms tsim cov tes hauj lwm hexagonal los ntawm sp² hybridized orbitals, ua rau muaj kev ua hluav taws xob thiab thermal conductivity zoo heev. Hauv cov chaw kub siab, cov graphite thermal fields uas muaj purity siab tuaj yeem tiv taus qhov kub siab tshaj 1600 ° C thaum tswj kev ruaj khov ntawm tshuaj lom neeg, tiv thaiv kev cuam tshuam nrog cov khoom siv xws li molten silicon.
Hais txog kev tsim khoom, cov txheej txheem suav nrog kev xaiv cov khoom siv raw, kev tsim, sintering, thiab kev ntxuav. Cov khoom siv raw raug tsoo thiab sib tsoo ua hmoov me me, thiab cov khoom tsis huv xws li sulfur thiab hlau oxides raug tshem tawm los ntawm kev ntxuav kua qaub. Thaum lub sijhawm tsim, cov ntaub ntawv raug tsim los ntawm kev siv cov tshuab nias lossis isostatic pressing technology, qhov twg qhov siab tshaj 200 MPa ua rau cov khoom siv ntom ntom. Cov txheej txheem sintering tshwm sim hauv cov cub tawg kub siab tshaj 2000 ° C, tso cai rau cov pa roj carbon rov qab thiab tsim cov qauv siv lead ua kom raug. Kev ntxuav yog ua nyob rau hauv qhov chaw kub siab tsis muaj oxygen los ntawm kev ua kom cov tshuaj tiv thaiv carbonization, ua rau cov pa roj carbon ntau ntxiv txog li 99.99%.
Hauv kev siv ua haujlwm, cov teb thermal graphite uas muaj cov khoom siv siab purity ntsib teeb meem xws li kev tswj qhov kub thiab cov khoom siv ruaj khov. Los ntawm kev ua kom zoo dua qhov tsim thermal field—xws li kev kho qhov faib hluav taws xob ntawm cov khoom cua sov thiab kev txhim kho cov qauv txias—kev tswj qhov kub thiab txias kom meej tuaj yeem ua tiav, yog li ua kom zoo dua qhov zoo ntawm kev loj hlob ntawm cov siv lead ua. Piv txwv li, kev siv cov ntaub ntawv rwb thaiv tsev ntau txheej thiab cov qauv cua txias zoo txo qhov poob cua sov thiab txhim kho kev ua haujlwm thermal. Kev ruaj khov tuaj yeem txhim kho ntxiv los ntawm cov thev naus laus zis kho qhov chaw; piv txwv li, cov txheej txheem silicon carbide tuaj yeem ua rau muaj kev tiv thaiv corrosion ntau dua peb zaug, txuas ntxiv lub neej ua haujlwm ntawm lub teb thermal. Cov kev nce qib thev naus laus zis no ua kom muaj kev ua haujlwm ruaj khov hauv lub cub tawg loj hlob ntawm cov siv lead ua thiab txhim kho qhov huv thiab kev sib xws ntawm cov siv lead ua, ua tau raws li qhov xav tau ntawm kev lag luam semiconductor thiab photovoltaic.
Raws li ib feem tseem ceeb ntawm cov cub tawg uas loj hlob siv lead ua ib leeg, kev ua tau zoo ntawm cov teb thermal graphite uas muaj cov khoom siv siab heev ncaj qha txiav txim siab qhov zoo ntawm cov siv lead ua thiab kev ua haujlwm zoo. Nrog rau kev nce qib ntawm thev naus laus zis, cov txheej txheem tsim khoom txuas ntxiv mus zoo dua thiab cov khoom siv tau txhim kho tas li. Cov thev naus laus zis ntxuav ntsuab—xws li methanol solvent vapor-phase reduction thiab hydrothermal reduction methods—tsis yog tsuas yog tiv thaiv kev ua qias tuaj ib puag ncig xwb tab sis kuj ua rau muaj kev tsim khoom loj. Cov ntaub ntawv sib xyaw, suav nrog silicon carbide-reinforced ceramic matrix composites, tau dhau los ua qhov chaw tshawb fawb vim lawv qhov kev ruaj khov thermal zoo heev thiab cov khoom siv kho tshuab. Lub caij no, kev siv nanotechnology ua rau muaj kev ua tau zoo ntawm thermal conductivity thiab kev ua haujlwm kho tshuab, xws li hauv cov khoom sib xyaw carbon nanotube-reinforced.
Saib mus tom ntej, cov teb graphite thermal uas muaj cov khoom siv graphite uas muaj cov khoom siv siab yuav txuas ntxiv tsav kev tsim kho tshiab hauv kev siv tshuab crystal loj hlob. Los ntawm kev tshawb fawb thiab kev txhim kho tas mus li, kev txhim kho ntxiv hauv kev ntshiab thiab zoo ntawm crystal yuav ua tiav, ua tau raws li qhov xav tau ntawm kev lag luam ntawm cov lag luam semiconductor thiab photovoltaic thiab muab kev txhawb nqa tseem ceeb rau kev tsim cov crystal uas muaj cov khoom siv siab.
Lub sijhawm tshaj tawm: Lub Peb Hlis-04-2026