Ukuhlaziywa okuningiliziwe komgomo wokushisa we-graphite rod

Ukuhlaziywa okuningiliziwe komgomo wokushisa we-graphite rod

Induku ye-graphite ivame ukusetshenziswa njenge-I-heater kagesi yesithando sokushisa esiphezulu se-vacuum. Kulula ukwenza i-oxidize ekushiseni okuphezulu. Ngaphandle kwe-vacuum, ingasetshenziswa kuphela endaweni engathathi hlangothi noma enciphisa umoya. Ine-coefficient encane yokwanda okushisayo, ukuguquguquka okukhulu kwe-thermal, ukumelana nokushisa okuphezulu, ukubanda okukhulu nokumelana nokushisa okwedlulele, kanye nentengo ephansi. Izinga le-oxidation nezinga lokuvuthwa kwe-graphite lithinta impilo yesevisi ye-generator yokushisa. Uma isikhala sangempela singu-10-3 ~ 10-4 mmHg, izinga lokushisa lesevisi kufanele libe ngaphansi kuka-2300 ℃. Emkhathini ovikelayo (H2, N2, AR, njll.), izinga lokushisa lesevisi lingafinyelela ku-3000 ℃. I-graphite ayikwazi ukusetshenziswa emoyeni, ngaphandle kwalokho izokwenziwa i-oxidized futhi idliwe. Isabela ngokuqinile nge-W ngaphezu kuka-1400 ℃ ukuze yakhe ama-carbides.
Induku ye-graphite yakhiwe ngokuyinhloko nge-graphite, ngakho-ke singayiqonda futhiizici ze-graphite:
Iphuzu lokuncibilika kwegraphite liphezulu kakhulu. Iqala ukuthamba futhi ijwayele ukuncibilika lapho ifinyelela ku-3000C ngaphansi kwe-vacuum. Ku-3600c, i-graphite iqala ukuhwamuka futhi i-sublimate. Amandla wezinto ezijwayelekile ayancipha kancane kancane ekushiseni okuphezulu. Nokho, lapho i-graphite ifudunyezwa ifike ku-2000c, amandla ayo aphindwe kabili kunaleyo esezingeni lokushisa elivamile. Kodwa-ke, ukumelana ne-oxidation ye-graphite kubi, futhi izinga le-oxidation liyakhula kancane kancane ngokunyuka kwezinga lokushisa.
I-conductivity eshisayo kanye ne-conductivity ye-graphite iphezulu kakhulu. I-conductivity yayo iphakeme izikhathi ezi-4 kuneyensimbi engagqwali, izikhathi ezi-2 ziphakeme kune-carbon steel futhi izikhathi eziyi-100 ziphakeme kunezingezona ezensimbi ezijwayelekile. I-conductivity yayo eshisayo ayidluli nje kuphela izinto zensimbi ezifana nensimbi, insimbi nomthofu, kodwa futhi iyancipha ngokunyuka kwezinga lokushisa, elihlukile ezintweni zensimbi ezijwayelekile. I-graphite ijwayele ukuba ne-adiabatic ezingeni lokushisa eliphezulu kakhulu. Ngakho-ke, ukusebenza kokushisa okushisayo kwe-graphite kunokwethenjelwa kakhulu ngaphansi kwezimo zokushisa eziphakeme kakhulu.
Ekugcineni, singaphetha ngokuthi isimiso sokushisa seinduku ye-graphiteiwukuthi: lapho i-current enezelwa entweni ye-graphite inkulu, izinga lokushisa elingaphezulu le-graphite rod liyanda.