Uhlalutyo olunzulu lomgaqo wokufudumeza wentonga yegraphite

Uhlalutyo olunzulu lomgaqo wokufudumeza wentonga yegraphite

Intonga yegraphite isoloko isetyenziswa njengeIsifudumezi sombane se-vacuum yobushushu obuphezulu. Kulula ukwenza i-oxidize kwiqondo lokushisa eliphezulu. Ngaphandle kwe-vacuum, inokusetyenziswa kuphela kwindawo engathathi hlangothi okanye ekunciphiseni umoya. Ine-coefficient encinci yokwandiswa kwe-thermal, i-conductivity enkulu ye-thermal, ukumelana nobushushu obuphezulu, ukubanda okukhulu kunye nokuxhathisa ukushisa okukhulu, kunye nexabiso eliphantsi. Isantya se-oxidation kunye nesantya sokuguquka kwegraphite sichaphazela ubomi benkonzo yejeneretha yobushushu. Xa indawo eyinyani iyi-10-3 ~ 10-4 mmHg, ubushushu benkonzo kufuneka bube ngaphantsi kwe-2300 ℃. Kwimeko yokukhusela (H2, N2, AR, njl.), ubushushu benkonzo bunokufikelela kwi-3000 ℃. Igraphite ayikwazi ukusetyenziswa emoyeni, ngaphandle koko iya kuba yi-oxidized kwaye idliwe. Isabela ngamandla nge-W ngaphezulu kwe-1400 ℃ ukwenza i-carbides.
Intonga yegraphite ikakhulu yenziwe ngegraphite, ngoko ke sinokuqondaiimpawu zegraphite:
Indawo yokunyibilika yegraphite iphezulu kakhulu. Iqala ukuthamba kwaye ithande ukunyibilika xa ifikelela kwi-3000C phantsi kwevacuum. Kwi-3600c, igraphite iqala ukujika ibe ngumphunga kunye ne-sublimate. Amandla ezinto eziqhelekileyo ziyancipha ngokuthe ngcembe kwiqondo lokushisa eliphezulu. Noko ke, xa i<em>graphite ifudunyezwa ukuya kuma-2000c, amandla ayo aphindwe kabini kubushushu begumbi. Nangona kunjalo, ukuxhathisa kwe-oxidation yegraphite kubi, kwaye izinga le-oxidation liyenyuka ngokuthe ngcembe ngokunyuka kwamaqondo obushushu.
I-thermal conductivity kunye ne-conductivity ye-graphite iphezulu kakhulu. I-conductivity yayo ngamaxesha angama-4 aphezulu kuneyensimbi engenasici, i-2 iphakamileyo ngaphezu kwekhabhoni yensimbi kunye namaxesha angama-100 aphezulu kunawo onke angeyona isinyithi. I-conductivity yayo ye-thermal ayigqithisi kuphela kwizinto zetsimbi ezifana nentsimbi, isinyithi kunye nelothe, kodwa iyancipha ngokunyuka kweqondo lokushisa, elihluke kwizinto eziqhelekileyo zetsimbi. Igraphite ithande ukuba yi-adiabatic kumaqondo obushushu aphezulu kakhulu. Ngoko ke, ukusebenza kwe-thermal insulation ye-graphite inokwethenjelwa kakhulu phantsi kweemeko zokushisa eziphezulu.
Ekugqibeleni, sinokugqiba ukuba umgaqo wokufudumeza weintonga yegraphiteyi: i-inkulu yangoku eyongeziweyo kwintonga yegraphite, iphezulu iqondo lobushushu lomphezulu wentonga yegraphite.