Cov ntaub ntawv zoo tshaj plaws muaj cov ntaub ntawv muaj zog, thermal ruaj khov, ua rau nws muaj cov ntaub ntawv tseem ceeb tshaj plaws xws li cov roj teeb hauv kev siv xov tooj. Piv txwv li, ib hom tshwj xeeb ntawm graphite, tau xaj cov pyrolytic graphite (Hopg), yog ib qho feem ntau siv nyob rau hauv chaw soj nstuamtor. Cov khoom siv. Cov khoom zoo tshaj plaws yog vim cov txheej txheem fawm kib ntawm cov pa hluav taws xob, cov cua sov thiab hluav taws xob kev cuam tshuam ntawm cov txheej txheem graphene. Qhov kev txiav txim ua tau nyob rau hauv qib siab ntawm kev hloov tau. graphite. Txawm hais tias graphite tau pom hauv qhov ntau dua 1000 xyoo thiab nws cov khoom cuav muaj ntau dua 100 xyoo, ob qho zoo ntawm cov duab graphite, ob qho tib si thiab hluavtaws, yog qhov zoo tshaj plaws. Piv txwv li, qhov loj me ntawm cov siv lead ntau tshaj plaws hauv cov khoom sib txawv ntawm ntau yam li quartz ib leeg muaju thiab silicon ib qho muaju. Qhov loj me tuaj yeem ncav cuag cov nplai ntawm lub meter. Qhov loj me me ntawm ib leeg-crystal graphite yog vim cov txheej txheem tsis muaj zog ntawm cov graphene txheej, yog qhov yooj yim tawg rau hauv ntau lub ciam teb hauv kev tsis sib haum. Cov. Txhawm rau daws qhov teeb meem tseem ceeb no, xibfwb lub koom haum ntawm Kev Tshawb Fawb, thiab lwm tus tau thov kom muaj kev txiav txim nyias nyias-ntawm-qhov tseem ceeb graphite ib qho muaju. Zaj duab xis, mus rau hauv nti nti. Lawv txoj kev siv ib qho-siv lead ua npib Hloov chaw siv cov duab npav gaseous, lawv tau xaiv rau cov roj carbon cov roj carbon monoxed kom yooj yim graphite loj hlob graphite. Lub tswv yim tshiab no ua rau nws muaj peev xwm tsim cov yeeb yaj kiab ib leeg nrog cov tuab ntawm 1 nti, lossis ntau dua 100,000 graphene txheej hauv ob peb hnub. Piv rau txhua tus muaj cov qauv graphite, ib leeg-crystal graphite muaj lub thermal conductivity ntawm ~ 2880 w m-1k-1, ib cov ntsiab lus tseem ceeb ntawm kev tsis txaus ntseeg, thiab qhov kev ncua tsawg kawg ntawm cov khaubncaws sab nraud povtseg. (1) Cov khoom siv vam meej ntawm ib leeg-siv lead ua nickel ntawm loj li ultra-ca subtrates zam kev tsis lees paub ntawm graphite graphite; (2) 100,000 txheej ntawm graphene yog cog missothermally nyob rau hauv txog 100 teev, yog li txhua ib txheej ntawm ib puag ncig ib puag ncig thiab kub, uas ua kom cov tsis zoo ntawm graphite; (3) Kev muab cov pa roj carbon txuas ntxiv los ntawm kev thim rov qab ntawm cov kab ntawm cov nickel txuas ntxiv loj hlob ntawm tus nqi sib txuas tsis tu ncua, kwv yees li ib txheej txhua tsib feeb, "
Lub Sijhawm Post: NOV-09-2022