Nyob rau hauv lub ntiaj teb no ntawm metallurgy thiab cov ntaub ntawv science,lub crucibleyog ib qho cuab yeej tseem ceeb rau melting thiab casting hlau.Ntawm ntau hom crucibles, graphite silicon carbide (SiC) crucibles sawv tawm rau lawv cov khoom tshwj xeeb, xws li thermal conductivity, zoo heev thermal shock resistance, thiab superior tshuaj stability.Nyob rau hauv tsab xov xwm no, peb yuav delve rau hauv daim ntawv qhia rau graphite SiC crucibles thiab tshawb xyuas seb lawv muaj pes tsawg leeg pab txhawb rau lawv cov kev ua tau zoo heev hauv cov ntawv thov kub.
Cov khoom xyaw tseem ceeb
Cov khoom tseem ceeb ntawm graphite SiC crucibles yog flake graphite thiab silicon carbide.Flake graphite, feem ntau yog tsim los ntawm 40% -50% ntawm cov crucible, muab cov thermal conductivity zoo thiab lubrication, uas pab kom yooj yim tso tawm ntawm cov hlau cam khwb cia.Silicon carbide, ua 20% -50% ntawm lub crucible, yog lub luag hauj lwm rau lub crucible lub siab thermal shock tsis kam thiab tshuaj stability ntawm siab kub.
Cov Cheebtsam Ntxiv rau Kev Ua Haujlwm Zoo
Txhawm rau txhim kho qhov kub thiab txias kev ua tau zoo thiab tshuaj lom neeg ruaj khov ntawm lub crucible, cov khoom ntxiv tau ntxiv rau hauv daim ntawv qhia:
- Elemental silicon hmoov (4% -10%): Txhim kho qhov kub thiab txias zog thiab oxidation tsis kam ntawm crucible.
- Boron carbide hmoov (1% -5%): Ua kom muaj tshuaj lom neeg ruaj khov thiab ua haujlwm rau cov hlau corrosive.
- Av nplaum (5% -15%): Ua raws li kev khi thiab txhim kho cov neeg kho tshuab lub zog thiab thermal stability ntawm lub crucible.
- Thermosetting binder (5% -10%): Pab txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau ua kom muaj kev sib koom ua ke.
Cov Formula High-End
Rau cov ntawv thov uas xav tau kev ua haujlwm siab dua, cov qauv graphite crucible yog ua haujlwm.Cov mis no muaj 98% graphite hais, 2% calcium oxide, 1% zirconium oxide, 1% boric acid, 1% sodium silicate, thiab 1% aluminium silicate.Cov khoom xyaw ntxiv no muab kev tiv thaiv tsis sib xws rau qhov kub thiab txias thiab muaj tshuaj lom neeg ib puag ncig.
Kev tsim khoom
Kev npaj ntawm graphite SiC crucibles koom nrog cov txheej txheem zoo.Thaum pib, flake graphite thiab silicon carbide yog sib xyaw kom huv si.Tom qab ntawd, elemental silicon hmoov, boron carbide hmoov, av nplaum, thiab cov thermosetting binder ntxiv rau qhov sib tov.Tom qab ntawd cov sib tov yog nias rau hauv cov duab siv lub tshuab xovxwm txias.Thaum kawg, cov zoo li tus crucibles yog sintered nyob rau hauv ib tug high-kub rauv los txhim kho lawv txhua yam muaj zog thiab thermal stability.
Daim ntawv thov thiab qhov zoo
Graphite SiC crucibles tau siv dav hauv kev lag luam metallurgical rau melting thiab casting hlau xws li hlau, hlau, tooj liab, thiab txhuas.Lawv cov thermal conductivity zoo dua ua kom cov cua sov tsis sib xws thiab txo kev siv zog.Lub siab thermal poob siab kuj txo qhov kev pheej hmoo ntawm kev tawg thaum lub sij hawm hloov kub ceev, thaum lawv cov tshuaj ruaj khov ua kom cov purity ntawm cov hlau molten.
Nyob rau hauv xaus, daim ntawv qhia rau graphite silicon carbide crucibles yog ib tug zoo-tuned sib tov ntawm cov ntaub ntawv uas muab ib tug sib npaug ntawm thermal conductivity, thermal shock resistance, thiab tshuaj stability.Qhov no muaj pes tsawg leeg ua rau lawv indispensable nyob rau hauv lub tshav pob ntawm metallurgy, qhov twg lawv ua si ib tug tseem ceeb luag hauj lwm nyob rau hauv lub npaum thiab txhim khu kev qha melting thiab casting ntawm hlau.
Los ntawm kev nkag siab txog cov khoom thiab cov txheej txheem tsim khoom ntawm graphite SiC crucibles, kev lag luam tuaj yeem ua cov kev xaiv paub rau lawv cov kev siv tshwj xeeb, kom ntseeg tau tias kev ua tau zoo thiab kev ua haujlwm ntev ntawm lawv cov crucibles.Raws li kev siv thev naus laus zis, kev txhim kho ntxiv hauv daim ntawv qhia thiab kev tsim cov txheej txheem ntawm graphite SiC crucibles yuav tsum, ua rau txoj hauv kev kom muaj txiaj ntsig zoo dua thiab muaj txiaj ntsig zoo.
Post lub sij hawm: Mar-12-2024