Graphite muaj kev

Graphite muaj cov khoom siv fiber ntau nrog cov ntsiab lus carbon ntawm ntau tshaj 99% ua los ntawm cov khoom siv roj carbon ntau dhau ntawm 2200 {{700} 2500 degree. Nws yog feem ntau muab faib ua peb pawg: asphalor raws li, polyacrylonitrile raws li, thiab cov nplaum. Cov ntaub ntawv no tau ua lag luam nyob rau hauv lub xyoo 1960s thiab muaj kub ua hauj (txog 3000℃hauv qhov chaw tsis oxidizing, thiab corrosion tsis kam, thiab kev ua kom tiav. Nws yog dav siv los ua cov rwb thaiv tsev txheej rau tib lub crystal silicon smating rauv thiab rau kev lim high-purity tshuaj sweetents.
Muaj cov txheej txheem sib txawv hauv ntiaj teb cov txheej txheem ntau lawm: Japan tsuas siv cov ntaub ntawv ashrhalt, thaum cov neeg Asmeskas feem ntau siv polyacrylonitrile raws ntaub ntawv rau kev tsim khoom. Polyacrylonitrile Raws li cov khoom tau dhau los ua cov mainstream vim lawv lub zog siab, thiab cov khoom siv hluav taws xob tsis kam muaj yooj yim tab sis qis zog. Nyob rau hauv daim ntawv thov monocrystalline silicon rauv, nws yog feem ntau sib xyaw ua ke muaj kev tiv thaiv kev ua pa hluav taws xob thiab rwb thaiv tsev cov laug cam kom ua kom zoo tshaj plaws thermal ruaj khov. Lub thev naus laus zis ntxiv ua kom nws txoj kev pabcuam lub neej thiab lub zog {{txuag kev txuag khoom thiab anti {}} oxidation kev kho mob.
Cov carbon kev xav tau kho ntawm qhov kub tshaj 2000℃hauv qab lub tshuab nqus tsev los ua cov pa roj carbon ntau dua li cov carbon kev xav, mus txog 99%. Nyob rau hauv lub xyoo 1960s, muaj twb tau muab cov khoom lag luam graphite muaj cov khoom lag luam nyob hauv lub ntiaj teb. Graphite thiab muaj kev faib ua peb hom raws li kev xaiv ntawm daim tseem ceeb: asphalt raws li graphite muaj kev xav, thiab cov nplaum raws cov duab.
Ntawm lawv, asphalt sawv cev los ntawm Nyiv Wu Tshuaj yog lub ntsiab hauv cov nplaum kev lag luam, thaum nyob hauv Suav teb, feem ntau yog ua los ntawm polyacrylonitrile raws cov ntaub ntawv. Cov txheej txheem cuam tshuam nrog txiav polyacrylonitrile raws li cov carbon felt lossis nplaum raws li cov khoom siv uas yuav tsum muaj, thiab muab nws tso rau hauv ib lub thawv ua los ntawm cov khoom siv graphite. Daim duab graphite no yog muab tso rau hauv lub siab {{12} Cov tuabneeg rauv taws ua ke, muaj kev tiv thaiv los ntawm cov cua sov ntawm 100}}
Qhov project: Polypropylene Cyanide Raws Graphite muaj kev xav, cov nplaum raws cov duab muaj kev xav tau
Bulk ntom (g / cm?) 0.1 ~ 0.15 0.05} ~ 0.15
Nto ntom ntom (G / cm?) 600 ~ 1200 300} ~ 600
Cov ntsiab lus carbon (%) ntau dua lossis sib npaug rau 99 ntau dua lossis sib npaug ntawm 99
Cov ntsiab lus tshauv (%) 0.05 ~ 0.1 0.5} ~ 0.6
Lub zog (n ⊥) 60 ~ 70 5} ~ 10
(Qauv 50 × 200 ∥) 150 ~ 200 10 ~ 20
Thermal Condivity (W / MK) 0.06 (34.6 Degree)
Polyacrylonitrile Raws Graphite thiab tiv taus oxesive li cov nplaum, tab sis nws muaj qhov ntaug ntom, thiab kev ua haujlwm zoo dua. Ntxiv rau lub siab siab, kub tsis kam, corrosion kuj, thiab tsis muaj qhov zoo xws li folding graphite, hloov chaw, thiab muaj peev xwm xaws nrog xov paj. Lub ntsiab siv ntawm graphite graphite yog rwb thaiv tsev thiab thermal rwb thaiv tsev khoom rau monocrystalline silicon smorting rauv. Nws tuaj yeem raug siv los ua cov khoom lim rau cov khoom lim rau siab- kev huv huv corrosive tshuaj lom neeg hauv kev lag luam tshuaj. Graphite noj tau siv nyob rau ntawm ib qho kub ntawm ib ncig 3000℃nyob rau hauv tsis oxidizing cua.