Graphite yemhando yepamusoro ine simba rakanaka kwazvo remakanika, kugadzikana kwekupisa, kuchinjika kwakanyanya uye kuchinjika kwakanyanya kwekupisa uye kwemagetsi mukati mepasi, zvichiita kuti ive imwe yezvinhu zvakakosha zvepamberi pakushandiswa kwakawanda senge maconductor ephotothermal anoshandiswa semabhatiri mufoni. Semuenzaniso, mhando yakakosha yegraphite, highly ordered pyrolytic graphite (HOPG), ndeimwe yeanonyanya kushandiswa mumarabhoritari. Zvinhu. Hunhu hwakanaka uhwu hunokonzerwa nechimiro chegraphite, uko hukama hwakasimba pakati pemaatomu ekabhoni muzvikamu zvegraphene hunobatsira kune hunhu hwakanaka hwemakanika, kuchinjika kwekupisa uye kwemagetsi, nepo kusangana kushoma pakati pezvikamu zvegraphene. Kuita uku kunoguma nekuchinjika kwakanyanya. graphite. Kunyangwe graphite yakawanikwa muzvisikwa kwemakore anopfuura chiuru uye kugadzirwa kwayo kwekugadzira kwakadzidzwa kwemakore anopfuura zana, mhando yemasampuli egraphite, ese ari echisikigo neekugadzira, haisi yakanaka zvachose. Semuenzaniso, saizi yemadhomini makuru egirazi rimwe chete muzvinhu zvegraphite inowanzo kuve pasi pe1 mm, izvo zvinopesana zvakanyanya nehukuru hwemakristaro mazhinji akadai sequartz single crystals uye silicon single crystals. Saizi yacho inogona kusvika pachiyero chemita. Hukuru hudiki hwegrafiti imwe chete hunokonzerwa nekusashanda zvakanaka pakati pezvikamu zvegrafiti, uye kutsetseka kwechikamu chegraphene kwakaoma kuchengetedza panguva yekukura, saka graphite inokamurwa nyore nyore kuita miganhu yakawanda yezvikamu zvegraini imwe chete isina kurongeka. . Kuti vagadzirise dambudziko iri guru, Purofesa Emeritus weUlsan National Institute of Science and Technology (UNIST) nevamwe vake Purofesa Liu Kaihui, Purofesa Wang Enge wePeking University, nevamwe vakapa zano rekugadzira firimu regrafiti imwe chete ine makristaro matete, kusvika pachiyero cheinchi. Nzira yavo inoshandisa foil yenickel imwe chete sechikamu chepasi, uye maatomu ecarbon anopihwa kubva kumashure kwefoil yenickel kuburikidza ne "isothermal dissolving-diffusion-deposition process". Panzvimbo pekushandisa gaseous cardboard source, vakasarudza solid carbon material kuti iite kuti graphite ikure. Iyi nzira itsva inoita kuti zvikwanisike kugadzira mafirimu egrafiti yekristaro imwe chete ine ukobvu hweinenge 1 inch uye 35 microns, kana kuti anopfuura 100,000 graphene layers mumazuva mashoma. Zvichienzaniswa nemasampuli ese aripo egrafiti, graphite yekristaro imwe chete ine thermal conductivity ye ~2880 W m-1K-1, huwandu husina kusimba, uye daro diki pakati pelayers. (1) Kubudirira kwekugadzirwa kwemafirimu egrafiti imwe chete yekristaro yakakura se ultra-flat substrates kunodzivirira kusagadzikana kwegrafiti yakagadzirwa; (2) 100,000 layers egraphene anorimwa isothermally mumaawa angangoita 100, kuitira kuti layer yega yega yegraphene igadziriswe munzvimbo imwechete yemakemikari uye tembiricha, izvo zvinoita kuti graphite ive yakaenzana; (3) Kuwanikwa kwekabhoni kunoramba kuripo kuburikidza neseri kwenickel foil kunobvumira layers dzegraphene kuti dzirambe dzichikura nekukurumidza, dzinenge layer imwe chete masekondi mashanu ega ega,”
Nguva yekutumira: Mbudzi-09-2022