Lub hauv paus ntsiab lus ntawm carbon graphite feem ntau suav nrog nws cov txheej txheem tsim thiab lub cev thiab tshuaj lom neeg.
Txoj cai tsim
Kev tsim cov pa roj carbon graphite feem ntau yog ua tiav los ntawm kev kho cua kub ntawm cov khoom siv carbon. Nyob rau hauv qhov kub thiab txias ib puag ncig, carbon atoms rearrange thiab ua ke, hloov los ntawm cov qauv tsis sib haum mus rau cov txheej txheem txheej los ua graphite. Cov txheej txheem tshwj xeeb suav nrog cov kauj ruam hauv qab no:
Cais huab cua thiab ntxiv dag zog rau cov cua sov: Ua kom sov cov pa roj carbon monoxide ntawm qhov kub thiab txias kom tsis txhob muaj cov tshuaj tiv thaiv oxidation.
Carbide conversion mechanism: Carbon cov ntaub ntawv carbide nrog ntau yam minerals, thiab ces decomposes rau hauv hlau vapor thiab graphite ntawm kub. Cov zaub mov no ua raws li catalysts hauv cov txheej txheem graphitization.
Recrystallization txoj kev xav: Muaj cov graphite me me heev hauv cov khoom siv roj carbon. Nyob rau hauv qhov kub thiab txias, cov khoom siv lead ua no tau welded ua ke los ntawm qhov tshwj xeeb ntawm carbon atoms los tsim cov graphite loj dua.
Microcrystal txoj kev loj hlob: Nyob rau hauv qhov kev txiav txim ntawm tshav kub, polycyclic aromatic tebchaw muaj ib tug series ntawm pyrolysis tshua, thiab thaum kawg tsim ib tug loj aggregations ntawm planar molecules, tsim ib tug randomly stacked hexagonal carbon network dav hlau, uas yog, microcrystals.
Lub cev thiab tshuaj muaj zog
Graphite yog ib qho allotrope ntawm carbon, nrog txhua cov pa roj carbon atom txuas nrog peb lwm cov pa roj carbon atom los ntawm covalent bonds. Txhua cov pa roj carbon atom tseem khaws ib qho hluav taws xob dawb kom xa cov nqi, yog li graphite tuaj yeem ua hluav taws xob. Nws muaj cov khoom siv tshuaj ruaj khov, yog corrosion-resistant, thiab tsis yooj yim rau react nrog acids, alkalis thiab lwm yam tshuaj. Cov qauv siv lead ua ntawm graphite yog txheej txheej thiab tsim los ntawm ntau lub hexagons, uas ua rau nws muaj kev ua haujlwm zoo thiab lubricity.
