Graphite ji

An rarraba zane-zanen hoto zuwa yanayin zane-zanen hoto, jin zane-zanen polyacrylonitrile (tushen PAN), da kuma zane-zanen viscose da aka ji saboda zabin daban-daban na asali. Babban manufar shine ayi amfani dashi azaman ajiyar zafin rana da kayan rufin zafi don murhunan narkewar silinon monocrystalline. A cikin masana'antar sinadarai, ana iya amfani dashi azaman kayan tacewa don haɓakar haɓakar haɓakar sinadarai mai ƙarfi.

Abin da ake ji da shi yana cikin jiki bayan an bi da shi a zazzabi mai zafi sama da 2000 ℃ a ƙarƙashin yanayi ko yanayi. Abubuwan da ke cikin carbon ɗin sun fi na abin da ake ji a ciki, ya kai fiye da 99%. A ƙarshen shekarun 1960, an riga an riga an sami wadataccen hoto a duniya. Abubuwan da aka zana hoto ya kasu kashi-kashi, wanda aka zana a hoto na polyacrylonitrile da kuma wanda aka zana a jikin viscose saboda bambancin zaɓi na asalin ji.

Daga cikin su, kwalta da Kureha Chemical na Japan ke wakilta ita ce babbar al'ada a masana'antar kera kaya [2], Turawan Turai da na Amurka wadanda ake amfani da su na rufi ana yinsu ne da laka, yayin da yawancin China ke amfani da polyacrylonitrile a matsayin kayan masarufi. Tsari: Yanke carbon da ke cikin polyacrylonitrile da ake amfani da shi na carbon ko viscose a cikin girman da ake buƙata, mirgine shi a cikin wani bututu sannan saka shi cikin wani akwati da aka yi da kayan zane, kuma sanya akwatin jifa-jifa a cikin tanda mai tsananin zafin jiki (babban - wutar makera itace mai ƙirar bututu, matsakaiciyar mita, Tasa mai shigar da wuta ko wasu manyan zafin wuta tare da hanyoyin dumama), kariya ta iska ko iska mai tsafta, mai zafi zuwa 2200-2500 ° C a farashin dumama na 100-300 ° C / h, sannan a hankali sanyaya zuwa 100 ° C.

Graphite ji ne mai ƙarfi kuma yana da karfi hadawan abu da iskar shaka, amma yana da matalauta sassauci, babban girma yawa da kuma kyau zafi adana yi. Baya ga halaye na tsabtar tsarkakakke, juriya mai zafin jiki, juriya ta lalata, da rashin narkewar jadawalin zane, suna da fa'idodi na zama na roba, lankwasawa ba tare da izini ba, yankan, da dinki da zaren graf. Babban ma'anar hoto wanda aka ji shine azaman ajiyar zafi da kayan rufin zafi don murfin silinda mai lu'ulu'u. A cikin masana'antar sinadarai, ana iya amfani dashi azaman kayan tacewa don haɓakar haɓakar haɓakar sinadarai mai ƙarfi. Ana iya amfani da hoto mai jiwuwa a zafin jiki na kusan 3000 ° C a cikin yanayi mara iska.