Wayoyin da aka yi da PAN suna buƙatar a yi musu oxidizing kafin su yi aiki, a yi musu carbon mai ƙarancin zafi, sannan a yi musu carbon mai yawan zafin jiki don su samar.zaruruwan carbon, sannan a yi masa graphitized don yin zare na graphite. Zafin jiki yana kaiwa daga 200℃ zuwa 2000-3000℃, wanda ke gudanar da martani daban-daban kuma yana samar da tsari daban-daban, wanda hakan ke da halaye daban-daban.
1. Matakin Pyrolysis:Pre-oxidation a cikin ƙananan zafin jiki, ƙarancin carbonization a cikin ƙananan zafin jiki
Ana samun arylation na pre-oxidation, tsawonsa kusan mintuna 100, zafin jiki na 200-300 ℃, manufar ita ce a sanya sarkar macromolecular mai layi na thermoplastic PAN cikin tsarin trapezoidal mara jure zafi, babban martanin sarkar macromolecular na cyclization da haɗin gwiwar intermolecular, tare da amsawar pyrolysis da sakin ƙananan ƙwayoyin cuta da yawa. Ma'aunin arylation gabaɗaya shine kashi 40-60%.
Zafin carbonization mai ƙarancin zafiYawanci yana da zafin 300-800 ℃, galibi yana haifar da fashewar zafi, galibi yana amfani da dumama waya ta wutar lantarki mai zafi, matakin yana samar da iskar gas da kwalta mai yawa.
Halaye: Launin zare da aka riga aka yi oxidized zai yi duhu, yawanci baƙi ne, amma har yanzu yana riƙe da yanayin zaren, tsarin ciki ya fuskanci wani mataki na canje-canje na sinadarai, samuwar ƙungiyoyi masu aiki da yawa masu ɗauke da iskar oxygen da tsarin haɗin gwiwa, wanda hakan ke kafa harsashin carbonization na gaba.
2. Matakin carbonization (Mai zafi sosai), shine kafin oxidation na precursor a cikin yanayi mara aiki a lokacin da zafin jiki ya bazu, wanda baya ga carbon heteroatoms (kamar oxygen, hydrogen, nitrogen, da sauransu), don haka carbonization a hankali, samuwar amorphous carbon ko microcrystalline carbon structure. Wannan tsari muhimmin mataki ne a cikin samuwar kwarangwal na carbon. Zafin jiki gabaɗaya yana tsakanin 1000-1800 ℃, galibi amsawar zafi, yawancin masu dumama graphite ana amfani da su don dumama.
Halaye: Babban abin da ke cikin kayan da aka yi amfani da su wajen samar da carbon shine carbon, tsarin galibi tsarin carbon mara tsari ne ko kuma tsarin graphite mai cike da rudani, ikon amfani da wutar lantarki, halayen injiniya idan aka kwatanta da samfurin kafin oxidation yana da ƙaruwa sosai.
3. Graphitizationwani ƙarin maganin zafi ne na samfuran carbonization a mafi yawan zafin jiki don haɓaka tsarin carbon amorphous ko microcrystalline carbon zuwa tsarin kristal mai tsari. Ta hanyar aikin babban zafin jiki, ana sake tsara ƙwayoyin carbon don samar da tsarin layin hexagonal tare da babban matakin daidaitawa, don haka yana inganta yanayin lantarki da zafi da ƙarfin injina na kayan sosai.
Halaye: Samfurin da aka zana yana da tsarin graphite mai lu'ulu'u sosai, wanda ke ba da kyakkyawan yanayin wutar lantarki da zafi, da kuma ƙarfi mai ƙarfi da takamaiman modulus. Misali, babban moduluszaruruwan carbonana samun su ta hanyar babban matakin graphitization.
Takamaiman matakai da buƙatun kayan aiki don pre-oxidation, carbonization da graphitization:
Kafin a yi amfani da iskar oxygen: ana yin ta ne a cikin iska a zafin da aka sarrafa na 200-300°C. Ana buƙatar a yi amfani da matsin lamba don rage raguwar zare.
Carbonization: ana aiwatar da shi a cikin yanayi mara motsi tare da ƙaruwar zafin jiki a hankali zuwa 1000-2000°C.
Grafitization: ana yin sa ne a yanayin zafi mafi girma (2000-3000°C), yawanci a cikin injin ko a cikin yanayi mara motsi.
Lokacin Saƙo: Mayu-22-2025
