Kutheni iphepha legrafiti liqhuba umbane?
Ngenxa yokuba i-graphite inee-charges ezihamba ngokukhululekileyo, ii-charges zihamba ngokukhululekileyo emva kokufakelwa kombane ukuze zenze umbane, ukuze ikwazi ukuqhuba umbane. Isizathu sokwenyani sokuba i-graphite iqhube umbane kukuba ii-athomu ze-carbon ezi-6 zabelana ngee-electron ezi-6 ukuze zenze i-bond enkulu ye-∏66 kunye nee-electron ezi-6 kunye neziko ezi-6. Kwi-ring yekhabhoni yomaleko omnye we-graphite, zonke ii-rings ezinee-members ezi-6 zenza inkqubo edibeneyo ye-∏-∏. Ngamanye amazwi, kwi-ring yekhabhoni yomaleko omnye we-graphite, zonke ii-athomu zekhabhoni zenza i-bond enkulu ye-∏, kwaye zonke ii-electron ezikule bond inkulu ye-∏ zinokuhamba ngokukhululekileyo kumaleko, yiyo loo nto iphepha le-graphite linokuqhuba umbane.
I-Graphite sisakhiwo se-lamellar, kwaye kukho ii-electron ezikhululekileyo ezingadibaniyo phakathi kweengqimba. Emva kokufakelwa kombane, zinokuhamba ngendlela ethile. Phantse zonke izinto ziqhuba umbane, yinto nje yokumelana. Ulwakhiwo lwe-graphite lugqiba ukuba ine-resistivity encinci phakathi kwezinto zekhabhoni.
Umgaqo wokuqhuba iphepha legrafiti:
Ikhabhoni yiathom ye-tetravalent. Kwelinye icala, njengeeathom zesinyithi, ii-electron zangaphandle zilahleka lula. Ikhabhoni inee-electron zangaphandle ezimbalwa. Ifana kakhulu neesinyithi, ngoko ke inombane othile oqhubayo. , ii-electron zasimahla ezihambelanayo kunye nemingxunya ziya kuveliswa. Xa idibene nee-electron zangaphandle ezinokuthi ikhabhoni ilahleke lula, phantsi kwesenzo somahluko onokwenzeka, kuya kubakho intshukumo kwaye kugcwaliswe imingxunya. Yenza ukuhamba kwee-electron. Lo ngumgaqo wee-semiconductors.
Ixesha lokuthumela: Matshi-14-2022