Kev Purity Purity High
Siab - purity graphite feem ntau hais txog graphite nrog cov ntsiab lus carbon ntau dua 99.99%. Nws txoj kev tsim qauv tuaj yeem faib ua peb pawg: ntxhib {{{{{{5} {6} nplej} nplej qauv. Siab - purity graphite yog dav siv nyob rau hauv czochralski ib- Crystal silicon cub. Cov khoom siv yooj yim ntawm cov khoom sib xyaw ua ke yog feem ntau silicon ib - Crystal chips. Tam sim no, txoj kev txheej txheem kev loj hlob ntawm silicon ib lub tshuab siv tshuab ib txwm yog adopts czochralski (CZ) txoj kev. Lwm txoj hauv kev suav nrog kev sib nqus teb Czochralski txoj kev (Mcz), cheeb tsam (FZ), thiab ob chav crucible siv lead ua qauv. Czochralski ib tug - Crystal silicon siv hauv cov khoom lag luam hluav taws xob ntau yam rau 80% ntawm tag nrho cov nyiaj txiag monocrystalline. Graphite seem hauv czochralski ib - rech crystal silicon rauv yog consumables. Siab -}} Cov ntaub ntawv huv huv}}}}} {21}- Crystal Silicon Furnaces.
Lwm qhov tseem ceeb siv ntawm high -}} {{{{{{- nws cov ntaub ntawv metallic. Graphitation electrode kuj yog ib hom siab- purity graphite, uas tuaj yeem siv rau cov ntsiab lus tshwj tsis yog carbon. Graphite electrode rau kev tsom xam yog tsim los ntawm kev extrusion txoj kev. Lub tshuab hla kev cov ntsiab lus ntawm cov khoom tiav yuav tsum tsis txhob muaj ntau dua 6 * - 5. Thaum npaj cov qauv qauv rau kev tsom xam spectral thiab ntes impurities siv cov qauv tshuaj, hmoov zoo nkauj lossis cov hmoov ntshiab ntshiab graphite hmoov yuav tsum tau siv. Cov ntsiab lus tsis raws cai ntawm ob lub siab-}} cov ntaub ntawv purity yog 6 * 10-5; Hauv qee cov ntawv thov, cov pa roj carbon yuav tsum ncav cuag 99.995%, thiab tag nrho cov hmoov tshauv yog tsawg dua 5 * 10-6. Muaj peb txoj kev moulding rau high-purity graphite: extrusion molding, compression moulding, thiab iSostical nias.
Graphite cov ntaub ntawv rau lub zog nuclear
Graphite yog ib qho ntawm cov ntaub ntawv decelteration thiab cov ntaub ntawv muaj kev cuam tshuam hauv tsev nuclear reactors. Thaum Ntxov Refors tau tag nrho cov Paus. Graphite rau nuclear reactors tau siv raws li cov ntaub ntawv tsim muaj ntau thiab kim dua graphite electrodes nyob rau hauv cov ntaub ntawv xaiv, kev tswj hwm, thiab kev kuaj xyuas cov khoom tiav. Graphite rau nuclele reactors yuav tsum muaj cov hauv qab no: kev ua kom zoo tshaj plaws ntawm cov neeg tsis muaj zog, muaj zog ruaj khov rau hauv cov ncauj lus tsis huv, thiab cov ntsiab lus tsis sib xws. Cov ntsiab lus ntawm cov ntsiab lus xws li Boron thiab Cadmium uas yooj yim los nqus cov neeg yam tsis pub muaj kev tswj hwm.
Nuclear graphite yuav tsum muaj lub ntim ntim ntau dua m vim tias deceleration cuam tshuam ntawm cov kab sib tsoo tau ua tiav los ntawm kev sib tsoo ntawm cov pa roj atoms. Qhov ntau cov pa roj atoms hauv ib chav ntim ntim, qhov zoo dua. Yog li ntawd, ntim ntom yog ib qho ntawm cov ntsuas tseem ceeb ntawm noucar graphite. Lub qhov ncauj ntom kuj tseem cuam tshuam nrog cov porosity thiab permeability ntawm graphite. Txhawm rau kom tsis txhob poob ntawm cov roj nuclear thiab tshav kub kub, lub porosity thiab poroseberility yuav tsum raug txo kom tsawg rau ib theem. Cov kev kho tshuab zog ntawm graphite kuj tseem muaj feem xyuam rau nws lub zog ntom ntom. Feem ntau, cov ntim ntom ntawm cov graphite siv nyob rau hauv graphite stacks yog 1.7-1.75g / cm3.
Nuclear reactors siv rau cov khoom siv hluav taws xob uas yog tam sim no nias cov khoom siv dej uas tsis xav tau qhov kev ntseeg siab uas muaj kev txhim kho muaj kev tiv thaiv zoo. High - pa roj {}} Cov khoom siv roj hmab xav tau siv los ua cov khoom siv hluav taws xob siab, roj carbon monoxial} high - pa roj cua ze rau -5 tuaj yeem raug xa tawm ntawm tus reactor rau siv raws li lub zog.
Isotropic graphite
Txawm hais tias qhov kev txhais thoob ntiaj teb ntawm isotropic graphite yuav tsum tau hais ntxiv, qee yam kev ntsuas ntawm lub cev tau ntsuas, thiab lawv cov kev sib piv tau raug xam. Ib txhia yog qhia los ntawm kev sib piv ntawm thermal nthuav coefficients, thiab cov yooj yim yog qhia los ntawm kev piv ntawm resistivity. Lub anisotropy piv yog nyob rau hauv ntau yam ntawm 1.0 ~ 1.1, uas yog hu ua isotropic khoom, thiab thaum nws tshaj 1.1, nws yog hu ua anisotropic khoom. Ntxiv nrog rau cov roj av coke, isotropic graphite kuj siv cov nqaij nyuj sib xyaw, oxidized petroleum coke, oxidized petroleum coke, ntuj graphite, itc.