Vim li cas graphite ntawv ua hluav taws xob?
Vim tias graphite muaj cov nqi txav mus los dawb, cov nqi txav tau yooj yim tom qab hluav taws xob los ua tam sim no, yog li nws tuaj yeem ua hluav taws xob. Qhov laj thawj tiag vim li cas graphite ua hluav taws xob yog tias 6 carbon atoms sib koom 6 electrons los ua ib qho loj ∏66 daim ntawv cog lus nrog 6 electrons thiab 6 chaw. Nyob rau hauv cov pa roj carbon nplhaib ntawm tib txheej ntawm graphite, tag nrho cov 6-membered rings tsim ib tug ∏-∏ conjugated system. Nyob rau hauv lwm yam lus, nyob rau hauv cov pa roj carbon nplhaib ntawm tib txheej ntawm graphite, tag nrho cov pa roj carbon atoms tsim ib tug loj loj ∏ daim ntawv cog lus, thiab tag nrho cov electrons nyob rau hauv no loj ∏ daim ntawv cog lus yuav ntws dawb do nyob rau hauv lub txheej, uas yog vim li cas yog vim li cas graphite daim ntawv yuav ua tau. hluav taws xob.
Graphite yog cov qauv lamellar, thiab muaj cov hluav taws xob dawb uas tsis muaj kev sib txuas ntawm cov khaubncaws sab nraud povtseg. Tom qab hluav taws xob, lawv tuaj yeem txav mus los. Zoo tag nrho cov khoom siv hluav taws xob, nws tsuas yog teeb meem ntawm kev tiv thaiv. Cov qauv ntawm graphite txiav txim siab tias nws muaj qhov tsawg tshaj plaws resistivity ntawm cov ntsiab lus carbon.
Conductive txoj cai ntawm graphite ntawv:
Carbon yog tetravalent atom. Ntawm ib sab, ib yam li cov hlau atoms, cov electrons sab nraud tau yooj yim ploj. Cov pa roj carbon muaj tsawg dua cov hluav taws xob sab nraud. Nws zoo ib yam li hlau, yog li nws muaj qee yam hluav taws xob conductivity. , sib xws dawb electrons thiab qhov yuav raug generated. Ua ke nrog cov khoom siv hluav taws xob sab nraud uas cov pa roj carbon tau yooj yim poob, nyob rau hauv qhov kev txiav txim ntawm qhov sib txawv ntawm qhov sib txawv, yuav muaj kev txav mus los thiab sau lub qhov. Tsim kom muaj kev khiav ntawm electrons. Qhov no yog lub hauv paus ntsiab lus ntawm semiconductors.
Post lub sij hawm: Mar-14-2022