Garaafyada tayada sare leh waxay leedahay awood farsamo oo heer sare ah, xasilloonida kulaylka, dabacsanaanta sare iyo kuleylka diyaaradda iyo korantada oo aad u sarreeya, taasoo ka dhigaysa mid ka mid ah agabka ugu muhiimsan ee horumarsan ee codsiyada badan sida kirishbooyada kuleylka loo isticmaalo sida baytariyada taleefannada. Tusaale ahaan, nooca garaafka gaarka ah, oo si aad ah loo dalbado graphite pyrolytic (HOPG), waa mid ka mid ah kuwa ugu badan ee lagu isticmaalo shaybaarada. Qalab Guryahaan aadka u wanaagsan waxaa sabab u ah qaabka lakabka ah ee garaafyada, halkaas oo curaarta xooggan ee udhaxeysa atamka kaarboonka ee lakabyada graphene ay gacan ka geystaan sifooyin farsamo oo aad u fiican, kulaylka iyo korantada korantada, halka isdhexgalka aad u yar uu ka dhaxeeyo lakabyada graphene. Ficilku wuxuu keenaa dabacsanaan sare. garaafka In kasta oo graphite laga helay dabeecadda in ka badan 1000 sano oo farsamayntiisa macmalka ah la daraaseeyay in ka badan 100 sano, tayada shaybaarada garaafyada, labadaba dabiiciga ah iyo kuwa synthetic, ayaa ah mid aad uga fog. Tusaale ahaan, cabbirka xayndaabyada garaafiga ah ee ugu weyn ee qalabka garaafka ayaa caadi ahaan ka yar 1 mm, taas oo si weyn uga soo horjeeda cabbirka kiristaalo badan sida quartz hal crystals iyo crystals silicon. Cabbirku wuxuu gaari karaa cabbirka mitirka. Baaxadda aadka u yar ee garaafka hal-crystal-ka ah waxaa sabab u ah isdhexgalka daciifka ah ee ka dhexeeya lakabyada graphite, iyo flatness ee lakabka graphene waa ay adagtahay in la ilaaliyo inta lagu jiro koritaanka, sidaas darteed graphite si fudud ayaa loo jebiyaa dhowr xuduudood oo hal-crystal ah oo khalkhal ah. . Si loo xalliyo dhibaatadan muhiimka ah, Professor Emeritus oo ka tirsan Machadka Qaranka ee Sayniska iyo Tignoolajiyada ee Ulsan (UNIST) iyo la-hawlgalayaashiisa Prof. Liu Kaihui, Prof. Wang Enge oo ka tirsan Jaamacadda Peking, iyo kuwa kale ayaa soo jeediyay istaraatiijiyad lagu soo saarayo nidaamka-magnitude khafiifka ah. graphite hal kiristaalo. filim, ilaa miisaanka inch. Nidaamkoodu waxa uu u adeegsadaa foil nikkel ah oo hal-crystal ah sida substrate, iyo atamka kaarboonka waxaa laga quudiyaa gadaasha foornada nikkelka iyada oo loo marayo "nidaam kala dirid-faafin-soo-saarid-soothermal". Halkii laga isticmaali lahaa ilo kartoonada gaaska ah, waxay doorteen walxo kaarboon adag si ay u fududeeyaan korriinka garaafka. Istaraatiijiyadan cusub waxay suurtogal ka dhigaysaa in la soo saaro filimo garaafeed hal-crystal ah oo dhumucdiisu tahay 1 inch iyo 35 microns, ama in ka badan 100,000 oo lakabyo graphene ah dhawr maalmood gudahood. Marka la barbardhigo dhammaan muunadaha garaafka ee la heli karo, garaafka hal-crystal wuxuu leeyahay kuleyl kuleyl ah ~ 2880 W m-1K-1, wax aan macno lahayn oo wasakh ah, iyo masaafada ugu yar ee u dhaxaysa lakabyada. (1) Isku-dubbaridka guusha leh ee filimada nikkel-ka-crystal ee cabbirka weyn sida substrate-yada ultra-flat waxay ka fogaanayaan khalkhalka garaafka synthetic; (2) 100,000 lakab oo graphene ah ayaa si isothermally ah u koraan qiyaastii 100 saacadood, si lakab kasta oo graphene ah loo sameeyo jawi isku mid ah kiimikaad iyo heerkulka, kaas oo hubinaya tayada isku midka ah ee garaafka; (3) Sahayda joogtada ah ee kaarboonka iyada oo loo marayo dhinaca dambe ee foornada nikkel waxay u oggolaanaysaa lakabyada graphene inay si joogto ah u koraan heer aad u sarreeya, qiyaastii hal lakab shantii ilbiriqsi kasta, "
Waqtiga boostada: Nov-09-2022