Xaiv Cov Graphite Crucible Zoo Rau Kev Loj Hlob Crystal: Ib Phau Ntawv Qhia Ua Tau Zoo

Hauv ntiaj teb ntawmkev loj hlob ntawm cov siv lead ua—txawm yog rau SiC, GaN, sapphire, lossis lwm yam khoom siv siab heev—lub graphite crucible tsis yog ib lub thawv xwb. Nws yog ib qho ciam teb thermal, ib qho kev sib tshuam reaction, thiab ib lub rooj vag rau kev huv. Kev xaiv lub crucible zoo tuaj yeem cuam tshuam loj heev rau cov txiaj ntsig, qhov zoo ntawm crystal, thiab kev ruaj khov ntawm lub cub tawg.

Phau ntawv qhia no pab cov kws ua haujlwm txheej txheem, cov pab pawg R&D, thiab cov thawj coj yuav khoom nrhiav cov yam tseem ceeb thaum xaiv cov graphite crucibles rau kev loj hlob ntawm cov siv lead ua kub siab.

Vim li cas Graphite Crucibles yog Tus Qauv Kev Lag Luam

Graphite siv dav hauv kev loj hlob siv lead ua vim nws cov hauv qab no:

• Kev ua kom muaj cua sov siab thiab kev faib cua sov sib xws

• Kev tiv thaiv zoo heev rau kev poob siab thermal, tshwj xeeb tshaj yog thaum muaj kev caij tsheb kauj vab kub siab

• Kev hloov kho tau rau cov qauv geometries nyuaj thiab kev koom ua ke nrog cov txheej txheem coated (piv txwv li, SiC lossis TaC coatings)

• Tus nqi qis dua piv rau cov hlau ceramics lossis cov hlau refractory

Tiam sis nws tsis zoo tag nrho. Graphite tuaj yeem ua rau cov pa roj hauv ib puag ncig, ua rau kub hnyiab, thiab tso tawm cov khoom tsis huv yog tias tsis tau ntxuav lossis coated kom zoo. (1)

Cov Kev Xav Tseem Ceeb Thaum Xaiv Crucible

1. Qhov Kub thiab Kev Ruaj Ntseg

• Cov graphite txheem tuaj yeem ua haujlwm txog li ~ 2000 ° C, tab sis rau kev loj hlob sublimation ntawm SiC (> 2200 ° C), cov crucibles coated (piv txwv li, TaC, SiC) yog qhov tseem ceeb.
• Rau cov voj voog loj hlob ntev, kev ruaj khov ntawm qhov ntev thiab kev tiv thaiv kev nkag mus yog qhov tseem ceeb heev.

2. Kev Sib Piv ntawm Cov Khoom Siv

• Cov txheej txheem puas muaj Si, C, halogens, lossis hydrogen? Txhua tus tuaj yeem tawm tsam graphite sib txawv.
• Cov txheej txheem ua los ntawm Si feem ntau tau txais txiaj ntsig los ntawm SiC coatings los tiv thaiv kev ua qias tuaj thiab kev xeb.

3. Kev Tswj Xyuas Kev Huv thiab Kev Ua Phem

• Cov graphite uas muaj purity siab (>99.99%) yog qhov tseem ceeb rau cov khoom siv hluav taws xob thiab cov khoom siv semiconductor.
• Xav txog cov crucibles uas tau coated thaum cov khoom siv migration (piv txwv li, B, Al, Fe) yuav ua rau cov crystal zoo tsis zoo.

4. Hom txheej txheem

• Txheej SiC: Ib txwm muaj rau kev loj hlob ntawm SiC siv lead ua; zoo thermal phim, tshuaj lom neeg inert
• Txheej TaC: Rau qhov kub thiab txias heev; muab kev xeb zoo dua thiab kev thaiv kev sib kis
• Kev Txheej Txheem Sib Xyaws: Kev daws teeb meem txheej txheem rau cov tshuaj tiv thaiv roj-theem tshwj xeeb

5. Kev Sib Txuas Lus Thermal & Kev Sib Koom Tes Rau Hauv Qhov Cub

• Lub geometry ntawm lub Crucible cuam tshuam rau qhov kub thiab txias sib npaug thiab kev ruaj khov ntawm thaj chaw loj hlob.
• Txhim kho qhov tsim crucible raws li kev simulation thaj chaw kub thiab CFD modeling.

Tej Yam Uas Yuav Tsum Tsis Txhob Ua

• Siv cov graphite tsis muaj txheej hauv cov huab cua nruj: Kev puas tsuaj sai, kev ua qias tuaj, thiab kev rov ua dua tsis zoo.

• Kev kwv yees qhov tuab ntawm txheej lossis kev sib npaug tsis txaus: Cov txheej txheej nyias nyias lossis tsis sib xws ua rau ua tsis tiav ua ntej lub sijhawm.

• Tsis quav ntsej txog qhov tsis sib xws ntawm kev nthuav dav thermal: Kev tawg lossis kev tawg hauv lub voj voog ntev vim yog kev sib txawv ntawm txheej / hauv paus.

Kev Txij Nkawm & Cov Lus Qhia Txog Lub Neej

• Ua ntej ci cov crucibles ua ntej siv thawj zaug kom txo tau cov pa tawm.

• Tshawb xyuas qhov zoo ntawm cov txheej txheem tsis tu ncua tom qab txhua zaus khiav, tshwj xeeb tshaj yog cov npoo thiab cov ces kaum.

• Taug qab cov lej voj voog crucible thiab tus qauv kev puas tsuaj - tsis yog txhua qhov kev ua tsis tiav pom tau sab nraud.

Cov Lus Qhia Tshwj Xeeb rau Daim Ntawv Thov