Dab tsi yog PAN Thiab Rayon Graphite Xav Siv Rau?

FAQ 1: Dab tsi yog graphite xav tau thiab vim li cas nws thiaj siv rau cov rwb thaiv tsev kub?
Graphite xav, tseem hu ua graphite fiber ntau los yog graphite lev, yog ib hom kev kub kub rwb thaiv tsev cov khoom ua los ntawm carbon fibers. Vim nws zoo heev thermal thiab tshuaj stability, nws yog dav siv nyob rau hauv ntau yam high-temperature daim ntaub ntawv, xws li rwb thaiv tsev rauv, thermal rwb thaiv tsev rau aerospace thiab marine engineering, thiab raws li ib tug electrode khoom nyob rau hauv roj hlwb.
Graphite muaj ntau qhov zoo dua li lwm hom ntaub ntawv rwb thaiv tsev xws li ceramic fibers thiab refractory cib. Nws yog lub teeb yuag, yoog raws, yooj yim rau nruab thiab muaj qhov kub thiab txias. Nws tuaj yeem tiv taus qhov kub txog li 3000 degree hauv lub tshuab nqus tsev thiab mus txog 2200 degree hauv huab cua. Tsis tas li ntawd, nws muaj cov thermal conductivity zoo heev, ua rau nws yog ib qho khoom siv zoo tshaj plaws rau kev siv hauv kev siv kub.
FAQ 2: Ua li cas graphite xav tau?
Graphite xav yog tsim los ntawm high-purity carbon fibers uas yog mechanically interlocked thiab needled ua ke los tsim ib tug niaj hnub web ntawm kev xav. Cov fibers siv nyob rau hauv graphite xav ntau lawm feem ntau yog ua los ntawm rayon, polyacrylonitrile (PAN), los yog petroleum pitch. Cov fibers yog thawj zaug ua kom tshem tawm impurities, thiab tom qab ntawd oxidized ntawm qhov kub thiab txias los txhim kho lawv lub zog thiab thermal zog.
Tom qab oxidation, cov fibers raug txiav kom ntev ntev thiab tom qab ntawd dhau los ntawm ntau cov txheej txheem, suav nrog daim npav thiab rab koob punching, los ua ib lub vev xaib txuas ntxiv ntawm kev xav. Tom qab ntawd cov kev xav tau impregnated nrog phenolic resin los txhim kho nws lub zog thiab ruaj khov. Thaum kawg, nws yog carbonized ntawm qhov kub thiab txias los tsim graphite xav nrog qhov xav tau thermal conductivity, ntom, thiab txhua yam khoom.
FAQ 3: Dab tsi yog qhov zoo ntawm kev siv graphite zoo rau cov rwb thaiv tsev kub?
Graphite muaj ntau qhov zoo dua li lwm hom ntaub ntawv rwb thaiv tsev, ua rau nws yog ib qho khoom siv zoo tshaj plaws rau kev siv hauv kev siv hluav taws xob kub. Ua ntej, nws muaj cov thermal conductivity zoo heev, uas yuav pab txo kom tsis txhob muaj cua sov thiab ua kom lub zog ua haujlwm.
Thib ob, nws yog lub teeb yuag thiab hloov tau yooj yim, uas ua rau nws yooj yim los lis thiab nruab rau hauv daim ntawv thov nyuaj. Thib peb, nws muaj qhov ruaj khov zoo heev, txawm tias qhov kub thiab txias, thiab tsis ntsws los yog deform zoo li lwm cov ntaub ntawv rwb thaiv tsev xws li ceramic fibers.
Fourthly, nws muaj peev xwm tiv taus thermal shock thiab muaj lub siab melting point, uas ua rau nws zoo tagnrho rau siv nyob rau hauv ib puag ncig hnyav nrog huab cua kub thiab kub hloov ceev. Thaum kawg, nws yog qhov ruaj khov thiab muaj lub neej ua haujlwm ntev, uas pab txo cov nqi kho thiab txhim kho kev ua haujlwm tag nrho.