Cov pa roj carbon dub yog cov xim dub uas nquag siv, uas tau txais los ntawm calcining organic teeb meem ntawm qhov kub thiab txias. Qhov dub ntawm carbon dub feem ntau nyob ntawm nws cov ntsiab lus carbon thiab particle loj. Cov xim dub ntawm cov pa roj carbon dub tuaj yeem nce ntxiv los ntawm kev ntxiv lwm cov ntaub ntawv thaum lub sijhawm tsim khoom.
Ib txoj hauv kev yog ntxiv cov hlau oxides rau carbon dub. Cov hlau oxides no muaj peev xwm nqus tau lub teeb thiab tuaj yeem txhim kho cov xim dub ntawm cov xim dub. Feem ntau siv hlau oxides xws li hlau oxide, chromium oxide thiab titanium oxide. Cov ntaub ntawv no tuaj yeem muab ntxiv rau txhua theem hauv cov pa roj carbon dub, tab sis feem ntau yog ntxiv thaum lub sijhawm calcination.
Lwm txoj kev yog ntxiv graphite rau carbon dub. Graphite yog ib yam khoom uas muaj cov ntsiab lus carbon siab thiab muaj peev xwm nqus tau lub teeb. Ntxiv graphite rau cov pa roj carbon dub tuaj yeem ua kom nws cov xim dub. Graphite feem ntau yog ntxiv thaum lub sij hawm calcination txheej txheem.
Lwm cov ntaub ntawv carbon, xws li carbon dub thiab graphite hmoov, kuj tuaj yeem muab ntxiv rau cov pa roj carbon dub kom ua kom cov xim dub.
Ntxiv cov hlau oxides, graphite thiab lwm yam khoom siv rau cov pa roj carbon dub tuaj yeem txhim kho nws cov xim dub. Thaum xaiv cov khoom siv ntxiv, lawv qhov cuam tshuam rau cov pa roj carbon dub kev ua tau zoo thiab cov nqi yuav tsum raug txiav txim siab.