Iingcingo eziluhlaza ezisekelwe kwi-PAN kufuneka zifakwe i-oxidized pre-oxidized, zibe yi-carbon ebushushu obuphantsi, kwaye zibe yi-carbon ebushushu obuphezulu ukuze zenziweiifayibha zekhabhoni, ize emva koko i-graphitized ukuze kwenziwe imicu ye-graphite. Ubushushu bufikelela kwi-200℃ ukuya kwi-2000-3000℃, nto leyo eyenza ii-reactions ezahlukeneyo kwaye yenze izakhiwo ezahlukeneyo, ezithi zona zibe neempawu ezahlukeneyo.
1. Inqanaba le-pyrolysis:Ukufakelwa kwe-oxidation kwinxalenye yobushushu obuphantsi, ukwenziwa kwe-carbonization kwinxalenye yobushushu obuphantsi
I-arylation yangaphambi kokuxiliswa iyenzeka, ubude bayo buyi-100 imizuzu, ubushushu buyi-200-300 ℃, injongo kukudibanisa i-thermoplastic PAN linear macromolecular chain kwisakhiwo se-trapezoidal esingenamandla obushushu seplastiki, eyona mpendulo iphambili ye-macromolecular chain ye-cyclization kunye ne-intermolecular crosslinking, ekhatshwa yi-pyrolysis reaction kunye nokukhululwa kwee-molecules ezininzi ezincinci. I-arylation index ngokubanzi yi-40-60%.
Ubushushu be-carbonization obuphantsi kubushushu obuphantsingokubanzi yi-300-800 ℃, ikakhulu i-thermal crack reaction, ikakhulu isebenzisa i-electric furnace wire heating enobushushu obuphezulu, iqonga livelisa inani elikhulu legesi yokukhupha umoya kunye ne-tar,.
Iimpawu: Umbala wefayibha efakwe i-oxidized uza kuba mnyama, ngesiqhelo umnyama, kodwa usagcina imo yefayibha, ulwakhiwo lwangaphakathi luye lwadlula kwinqanaba elithile lotshintsho lweekhemikhali, ukwakheka kwamaqela amaninzi asebenzayo aqulethe ioksijini kunye nolwakhiwo oludibanisayo, nto leyo ebeka isiseko se-carbonization elandelayo.
2. Inqanaba lokwenziwa kwekhabhoni (kubushushu obuphezulu), kukufakelwa kwe-pre-oxidation ye-precursor kwi-atmosphere engasebenziyo xa i-carbon collapse ibola kubushushu obuphezulu, ukususwa kwayo ukongeza kwi-carbon heteroatom (ezifana ne-oxygen, i-hydrogen, i-nitrogen, njl.njl.), ukuze i-carbonization ethe chu kancinci, ukwakheka kwe-carbon amorphous okanye isakhiwo se-microcrystalline carbon. Le nkqubo linyathelo elibalulekileyo ekwakhiweni kwe-carbon skeleton. Ubushushu ngokubanzi buphakathi kwe-1000-1800 ℃, ikakhulu i-thermal condensation reaction, uninzi lwe-graphite heaters zisetyenziselwa ukufudumeza.
Iimpawu: Icandelo eliphambili lezinto ezifakwe kwi-carbon yi-carbon, isakhiwo singumxube we-carbon okanye i-graphite engaguqukiyo, umbane wayo uqhuba, iimpawu zoomatshini xa kuthelekiswa nemveliso ye-pre-oxidation inokwanda okukhulu.
3. Ukwenziwa kweGraphitizationyindlela yonyango olushushu ngakumbi lweemveliso ze-carbonization kumaqondo obushushu aphezulu ukukhuthaza ulwakhiwo lwe-carbon e-amorphous okanye i-microcrystalline carbon kwisakhiwo sekristale ye-graphite esicwangcisiweyo ngakumbi. Ngokusebenzisa ubushushu obuphezulu, ii-athomu zekhabhoni zihlengahlengiswa ukuze zenze isakhiwo se-lattice layer esinama-hexagonal esinezinga eliphezulu lokujongwa, ngaloo ndlela ziphucula kakhulu umbane kunye nobushushu kunye namandla oomatshini bezinto.
Iimpawu: Imveliso efakelwe i-graphite inesakhiwo se-graphite esikristale kakhulu, esibonelela ngombane kunye nobushushu obuhle kakhulu, kunye namandla aphezulu athile kunye ne-modulus ethile. Umzekelo, i-modulus ephezuluiifayibha zekhabhonizifumaneka ngenqanaba eliphezulu le-graphitization.
Amanyathelo athile kunye neemfuno zezixhobo ze-pre-oxidation, i-carbonization kunye ne-graphitization:
Ukufakwa kwe-oxidation: kwenziwa emoyeni kubushushu obulawulwayo obuyi-200-300°C. Uxinzelelo kufuneka lusetyenziswe ukunciphisa ukuncipha kwefayibha.
Ukwenziwa kweCarbonization: kwenziwa kwindawo engenanto enokunyuka kancinci kobushushu ukuya kwi-1000-2000°C.
Ukufakelwa kwegrafiti: kwenziwa kumaqondo obushushu aphezulu (2000-3000°C), ngesiqhelo kwindawo engenamoya okanye kwindawo engenamoya.
Ixesha leposi: Meyi-22-2025
