Graphite muaj kev

Graphite xav tau muab faib ua suab-raws li graphite felt, polyacrylonitrile-based (PAN-based) graphite muaj kev xav, thiab viscose-based graphite muaj kev xav vim qhov sib txawv xaiv ntawm thawj felts. Lub hom phiaj tseem ceeb yog siv los ua kev tiv thaiv tshav kub thiab cov cua kub rwb thaiv tsev rau cov monocrystalline silicon smelting qhov cub. Hauv kev lag luam chemical, nws tuaj yeem raug siv los ua cov khoom siv lim rau cov tshuaj pleev xim rau cov tshuaj lom neeg lub cev.

Xav tias carbon muaj xws li graphite tom qab kho nyob rau qhov kub ntawm ntau tshaj 2000 ℃ hauv qab nqus lossis nqus cua. Cov pa roj carbon ntsiab lus yog siab dua qhov ntawm carbon carbon, ncav cuag ntau dua 99%. Qhov kawg ntawm 1960s, graphite xav tau twb muaj nyob hauv lub ntiaj teb. Graphite xav tau muab faib ua suab-raws, polyacrylonitrile-based graphite muaj kev xav thiab viscose-based graphite xav vim qhov xaiv sib txawv ntawm cov thawj xav.

Ntawm lawv, cov asphalt sawv cev los ntawm Kureha Chemical ntawm Nyiv yog qhov tseem ceeb hauv kev lag luam rwb thaiv tsev [2], cov European thiab Asmeskas cov yeeb yaj kiab tiv thaiv faus yog qhov ua los ntawm cov nplaum, thaum feem ntau ntawm Tuam Tshoj siv polyacrylonitrile ua cov ntaub ntawv raw. Txheej Txheem: Txiav cov polyacrylonitrile-based carbon hnov ​​los yog viscose-based carbon xav txog qhov loj me, yob nws rau hauv lub raj thiab muab tso rau hauv lub thawv uas ua los ntawm cov khoom siv graphite, thiab tso cov graphite ntim rau hauv qhov cub ua kom sov (qhov siab) -Tsaib qhov cub hluav taws xob cua kub yog graphite tube rauv taws, qhov hluav taws xob nruab nrab, Cov hluav taws xob kub ntau zaus lossis lwm cov khoom cua sov nrog cov cua kub txoj kev), tiv thaiv los ntawm lub tshuab nqus tsev lossis siab-purity inert roj, rhaub kom 2200-2500 ° C ntawm qhov kub ntawm 100-300 ° C / h, thiab tom qab ntawd huab cua txias txog 100 ° C.

Graphite xav tias muaj zog thiab muaj zog oxidation tsis kam, tab sis nws muaj qhov tsis ua haujlwm tsis zoo, ua haujlwm siab thiab ua kom zoo rau kev tiv thaiv thaum tshav kub. Ntxiv rau cov yam ntxwv ntawm kev siab dawb, siab kub tsis kam, kev tiv thaiv corrosion, thiab tsis yaj ntawm blockite, lawv kuj muaj qhov zoo ntawm kev ua elastic, arbitrary folding, txiav, thiab xaws nrog xov xov graphite. Lub hom phiaj tseem ceeb ntawm graphite xav yog thaum tshav kub kub ua kom sov thiab tiv thaiv kom sov cov khoom siv rau ib qho siv lead ua silicon smelting rauv. Hauv kev lag luam chemical, nws tuaj yeem raug siv los ua cov khoom siv lim rau cov tshuaj pleev xim rau cov tshuaj lom neeg lub cev. Graphite xav tuaj yeem siv tau ntawm qhov kub txog 3000 ° C hauv qhov chaw tsis muaj oxidizing.