I. Cov yam ntxwv ntawm cov qauv siv lead ua
Cov Qauv Txheej: Cov qauv siv lead ua ntawm cov roj av coke graphitized muaj cov tes hauj lwm planar ntawm cov pa roj carbon hexagonal. Cov tes hauj lwm planar no tau muab txheej los ntawm txheej, tsim cov qauv txheej txheem ib txwm muaj. Cov txheej txuas nrog los ntawm cov zog van der Waals tsis muaj zog, uas muab graphite nrog lubricity thiab anisotropy.
Cov Qauv Sib Txuas: Tom qab kev kho graphitization, cov qauv sib txuas (a₀ thiab c₀) ntawm cov roj av coke ze rau cov graphite ntuj, qhia txog qib siab ntawm kev zoo sib xws hauv lawv cov qauv siv lead ua. Cov yam ntxwv ntawm cov qauv no ua rau cov roj av coke graphitized ua rau muaj kev coj hluav taws xob thiab thermal zoo heev.
Cov Kev Ntsuas Microcrystalline: Siv X-ray diffraction, cov kev ntsuas xws li qhov sib nrug ntawm cov txheej (d₀₀₂), qhov nruab nrab ntawm cov txheej (Lₐ), thiab qhov siab ntawm cov khoom sib dhos (Lc) ntawm cov khoom me me hauv cov roj av coke uas muaj graphitized tuaj yeem suav tau. Cov kev ntsuas no qhia txog qhov loj me thiab kev teeb tsa ntawm cov khoom me me thiab ua cov cim qhia tseem ceeb rau kev ntsuam xyuas qib ntawm graphitization.
II. Cov teebmeem ntawm cov txheej txheem graphitization
Kev Hloov Pauv Los Ntawm Amorphous Mus Rau Crystalline State: Ua ntej graphitization, cov qauv carbon ntawm petroleum coke yog amorphous, uas yog tus cwj pwm los ntawm "ntev-ntau disordered, luv-ntau ordered" cov qauv khoom. Los ntawm kev kho graphitization (feem ntau ua tiav ntawm qhov kub siab xws li 2500 ° C txog 3000 ° C), cov amorphous carbon maj mam hloov mus rau hauv cov qauv siv lead ua graphite peb-seem.
Kev Nce Qib ntawm Microcrystallite Loj: Thaum lub sijhawm graphitization, qhov nruab nrab tuab (Lc) thiab dav (Lₐ) ntawm cov pa roj carbon lattice flakes nce, thaum qhov sib nrug ntawm cov txheej (d) txo qis. Qhov no ua rau muaj kev nce qib ntawm microcrystallite loj thiab cov qauv siv lead ua zoo dua.
Kev Txo Qhov Tiv Thaiv: Thaum qib ntawm graphitization nce ntxiv, qhov tiv taus ntawm graphitized roj av coke txo qis heev. Qhov no yog vim tias, thaum lub sijhawm graphitization, qhov kev npaj ntawm cov pa roj carbon atoms dhau los ua qhov kev txiav txim siab ntau dua, tso cai rau cov electrons txav mus los ntau dua hauv cov txheej txheej, yog li ua kom muaj kev coj hluav taws xob zoo dua.
III. Kev Sib Raug Zoo Ntawm Microstructure thiab Cov Khoom
Kev Ua Hluav Taws Xob: Cov qauv siv lead ua ke ntawm cov roj av coke graphitized ua rau cov electrons txav tau yooj yim hauv cov txheej txheej, ua rau muaj kev ua hluav taws xob zoo heev. Cov yam ntxwv no ua rau cov roj av coke graphitized siv tau dav hauv cov chaw xws li cov ntaub ntawv electrode thiab cov khoom siv conductive.
Kev Ua Kub: Vim yog lub zog van der Waals txuas cov khaubncaws sab nraud povtseg, cua sov tuaj yeem hloov pauv sai sai hauv cov khaubncaws sab nraud povtseg. Yog li ntawd, graphitized petroleum coke kuj ua rau muaj kev ua kub zoo, ua rau nws tsim nyog rau kev tsim cov ntaub ntawv tso cua sov thiab lwm yam kev siv.
Cov Khoom Siv Kho Tshuab: Cov qauv siv lead ua ntawm graphitized petroleum coke muab nws nrog qee lub zog kho tshuab. Txawm li cas los xij, piv rau cov khoom siv hlau, nws cov qauv txheej ua rau muaj kev sib txuas tsis muaj zog, ua rau muaj zog flexural thiab compressive qis dua. Cov yam ntxwv kev ua tau zoo no muab graphitized petroleum coke ib qho zoo dua rau daim ntawv thov hauv cov xwm txheej uas nws xav tau tiv taus qee qhov kev nyuaj siab tab sis tsis xav tau lub zog siab.
Lub sijhawm tshaj tawm: Lub Yim Hli-28-2025