Graphite anamva

Graphite imamva kuti imagawidwa ndi graphite yochokera phula, polyacrylonitrile-based (PAN-based) graphite imamverera, ndi viscose-based graphite imamva chifukwa chosankhidwa kosiyanasiyana kwa ma felts oyambira. Cholinga chachikulu ndikugwiritsidwa ntchito ngati kuteteza kutentha ndi zida zotchingira kutentha kwa monocrystalline silicon smelting. Makampani opanga mankhwala, atha kugwiritsidwa ntchito ngati fyuluta yopangira zinthu zoyera kwambiri zowononga mankhwala.

Mpweya wamtundu wa graphite umamverera mukamathandizidwa ndi kutentha kwakukulu kuposa 2000 ℃ pansi pa zingalowe kapena mumlengalenga. Zomwe zili ndi kaboni ndizokwera kuposa zomwe zimamveka kaboni, zikufikira zoposa 99%. Kumapeto kwa ma 1960, graphite idamva kuti idalipo kale padziko lapansi. Graphite imamveka kuti imagawidwa phula, polyacrylonitrile-based graphite yomwe imamveka ndi viscose-based graphite imamva chifukwa chosankhidwa kosiyanasiyana koyambirira.

Zina mwazo, phula loyimiriridwa ndi Kureha Chemical waku Japan ndizodziwika bwino pamsika wamafuta [2], anthu aku Europe ndi aku America otsekemera amapangidwa ndi zomata, pomwe ambiri ku China amagwiritsa ntchito polyacrylonitrile ngati zopangira. Ndondomeko: Dulani mpweya wa polyacrylonitrile womwe umamvekera kapena mpweya wa viscose womwe umamvekera kukula, ikulungikani mu chubu ndikuyiyika mu chidebe chopangidwa ndi zinthu za graphite, ndikuyika chidebe cha graphite mu ng'anjo yotentha kwambiri Ng'anjo yotentha ndi chubu la graphite chubu, pafupipafupi, Ng'anjo yotentha kwambiri kapena ng'anjo ina yotentha ndi njira zotenthetsera), zotetezedwa ndi zingalowe kapena mpweya wabwino kwambiri, wotentha mpaka 2200-2500 ° C pamlingo wotentha ya 100-300 ° C / h, kenako mwakhama utakhazikika mpaka 100 ° C.

Graphite imamva kuti ndiyolimba ndipo imakhala ndi mphamvu yotsutsana ndi makutidwe ndi okosijeni, koma imakhala ndi kusinthasintha kosavuta, kachulukidwe kochulukirapo komanso magwiridwe antchito oteteza kutentha. Kuphatikiza pamikhalidwe yoyera kwambiri, kutentha kwambiri, kutentha kwa dzimbiri, komanso kusasungunuka kwa graphite, amakhalanso ndi mwayi wokhala otanuka, opinda mwamphamvu, kudula, ndikusoka ndi ulusi wa graphite. Cholinga chachikulu cha graphite chomwe chimamveka ndikuteteza kutentha ndi kutchinjiriza kwa kutentha kwa ng'anjo imodzi ya sililicon. Makampani opanga mankhwala, atha kugwiritsidwa ntchito ngati fyuluta yopangira zinthu zoyera kwambiri zowononga mankhwala. Zithunzi za graphite zitha kugwiritsidwa ntchito pakatentha pafupifupi 3000 ° C m'malo osakhala okosijeni.