Chii chinonzi graphene?
Graphene chinhu chitsva chine hexagonal huchi retice chinogadzirwa nekuvhara kwekuvhara kwemaatomu e-single-layer carbon. Mune mamwe mazwi, ndeye maviri-dimensional kabhoni zvinhu uye ndeye imwechete element heteromorphic muviri wecarbon element. Iyo molecular bond yegraphene ingori 0.142 nm, uye iyo crystal plane spacing inongova 0.335 nm.
Vanhu vazhinji havana pfungwa yeyuniti ye nano. Nano chikamu chehurefu. Imwe nano inosvika gumi kusvika ku minus 9 square metres. Ipfupi pane bhakitiriya uye yakakura semaatomu mana. Chero zvazvingava, hatigoni kuona chinhu che 1 nm nemaziso edu asina kupfeka. Tinofanira kushandisa maikorosikopu. Kuwanikwa kwenanotechnology kwakaunza minda mitsva yebudiriro kuvanhu, uye graphene zvakare yakakosha tekinoroji inomiririra.
Kusvika pari zvino, graphene ndiyo yakaonda kupfuura makomisheni yakawanikwa munyika yevanhu. Ukobvu hwayo hwakangokora seatomu rimwe chete. Panguva imwecheteyo, ndiyo zvakare yakareruka zvinhu uye yakanakisa magetsi conductor munyika.
Munhu uye graphene
Zvisinei, nhoroondo yevanhu uye graphene yakagara kwenguva inopfuura hafu yezana remakore. Kare muna 1948, masayendisiti akawana kuvapo kwegraphene mune zvakasikwa. Nekudaro, panguva iyoyo, zvainge zvakaoma kudanho resainzi uye tekinoroji kusvuura graphene kubva kune imwechete-layer chimiro, saka magraphene aya akaiswa pamwechete, achiratidza mamiriro egraphite. Yese 1 mm yegraphite ine mamirioni matatu akaturikidzana egraphene.
Asi kwenguva yakareba, graphene yaionekwa seisipo. Vamwe vanhu vanofunga kuti chingori chinhu chinofungwa nesainzi, nekuti kana graphene iriko chaizvo, nei masayendisiti asingakwanise kuiburitsa ega?
Kusvikira 2004, masayendisiti Andre Geim naKonstantin Volov kubva kuYunivhesiti yeManchester muUnited States vakawana nzira yekuparadzanisa graphene. Vakaona kuti kana ma graphite flakes akabviswa kubva kune yakanyanya oriented pyrolytic graphite, ipapo mativi maviri e graphite flakes akanamatira kune yakakosha tepi, uye ipapo tepi yakabvamburwa, iyi nzira inogona kubudirira kuparadzanisa girafu flakes.
Mushure meizvozvo, iwe unongoda kudzokorora mashandiro ari pamusoro uchienderera mberi kuita kuti girafu pepa riri muruoko rwako riote uye ritete. Pakupedzisira, unogona kuwana pepa rakakosha rinoumbwa nemaatomu ekabhoni chete. Zvinyorwa zviri papepa iri chaizvoizvo graphene. Andre Geim naKonstantin Novoselov vakahwinawo Mubairo weNobel wekuwanikwa kwegraphene, uye avo vaiti graphene yakanga isipo vakarohwa kumeso. Saka nei graphene ichigona kuratidza hunhu hwakadaro?
Graphene, mambo wezvinhu
Kamwe graphene yakawanikwa, yakashandura zvachose marongerwo ekutsvaga kwesainzi munyika yese. Sezvo graphene yaratidza kuti ndiyo yakatetepa zvikuru pasi rose, giramu rimwe chete regraphene rinokwana kuvhara nhandare yenhabvu. Mukuwedzera, graphene zvakare ine yakanaka kwazvo yekupisa uye yemagetsi conductivity.
Iyo yakachena defect yemahara single-layer graphene ine yakanyanya kusimba yekupisa conductivity, uye yayo yekupisa conductivity yakakwira se5300w / MK (w / m · degree: uchifungidzira kuti iyo imwe-layer ukobvu hwechinhu 1m uye mutsauko wekushisa pakati pe mativi maviri i1C, chinhu ichi chinogona kuitisa kupisa kwakanyanya kuburikidza nenzvimbo yepamusoro ye1m2 muawa), Iyo kabhoni ine yakanyanya kupisa conductivity inozivikanwa nevanhu.
Product parameters SUNGRAF BRAND
Kuonekwa ruvara Black powder
Carbon content% > makumi mapfumbamwe nemapfumbamwe
Chip dhayamita (D50, um) 6~12
Hunyoro hwemukati% <mbiri
Density g / cm3 0.02~0.08
Nguva yekutumira: May-17-2022