Mune crystallography, chimiro chedhaimani chinonziwo diamond cubic crystal chimiro, icho chinoumbwa nekubatana kwakabatana kwekabhoni maatomu.Mazhinji ezvakanyanya zvimiro zvedhaimondi ndiwo mhedzisiro yakananga ye sp³ covalent bond simba rinoumba chimiro chakaomarara uye nenhamba shoma yemaatomu ecarbon.Metal inoitisa kupisa kuburikidza nemahara maerekitironi, uye yayo yakakwirira yekupisa conductivity inosanganiswa nepamusoro magetsi conductivity.Kusiyana neizvi, kupisa kupisa mudhaimani kunongoitwa chete nelattice vibrations (kureva, maphononi).Iwo akanyanya kusimba covalent zvisungo pakati pemaatomu edhaimani anoita kuti rigid crystal lattice ive neyekuzunguza frequency, saka tembiricha yayo yeDebye yakakwira se2,220 K.

 

Sezvo maapplication mazhinji akadzikira zvakanyanya pane tembiricha yeDebye, kupararira kwephonon kudiki, saka kupisa kwekuita kupikisa nephonon sezvo yepakati idiki zvakanyanya.Asi chero hurema hwelatiti huchaburitsa phonon kupararira, nekudaro ichidzikisa kupisa conductivity, inova inova hunhu hwese makristasi zvinhu.Kukanganisa mudhaimani kazhinji kunosanganisira kuremerwa kwemapoinzi senge inorema ˡ³C isotopes, nitrogen tsvina uye vacancies, kuremara kwakawedzera senge kurongedza zvikanganiso uye dislocation, uye 2D hurema senge miganhu yezviyo.

 

Iyo diamondi crystal ine yakajairwa tetrahedral dhizaini, umo ese mana mapeya ekabhoni maatomu anogona kugadzira covalent bond, saka hapana maerekitironi emahara, saka dhaimondi harigone kuitisa magetsi.

 

Pamusoro pezvo, maatomu ekabhoni ari mudhaimani anobatanidzwa nemabhondi mana-valent.Nekuda kwekuti chisungo cheCC mudhaimondi chakasimba kwazvo, maerekitironi ese evalence anotora chikamu mukuumbwa kwezvisungo zvecovalent, zvichigadzira piramidi-yakaita sekristaro chimiro, saka kuoma kwedhaimondi kwakakwira zvakanyanya uye nzvimbo yekunyungudika yakakwira.Uye chimiro chedhaimondi chinoitawo kuti chitore mabhendi mashoma emwenje, mazhinji echiedza chinovhenekerwa padhaimani chinoratidzwa kunze, saka kunyangwe chakanyanya kuoma, chinotaridzika sepachena.

 

Parizvino, izvo zvinonyanya kufarirwa kupisa zvinopisa zvinonyanya nhengo dzemhuri nano-carbon material, kusanganisirananodiamond, nano-graphene, graphene flakes, flake-shaped nano-graphite powder, uye carbon nanotubes.Zvisinei, zvisikwa zvemagirafu zvinopisa kupisa firimu zvigadzirwa zvakakora uye zvine yakaderera kupisa conductivity, izvo zvakaoma kuzadzisa zvinodikanwa zvekupisa kupisa kweramangwana guru-simba, rekubatanidza-density zvishandiso.Panguva imwecheteyo, haizadzise zvinodiwa nevanhu zvepamusoro-soro uye mutete, hupenyu hwebhatiri refu.Naizvozvo, zvakakosha zvakanyanya kuwana nyowani super-thermal conductive zvinhu.Izvi zvinoda zvinhu zvakadaro kuti zvive zvakaderera zvakanyanya kupisa kwekuwedzera kwekuwedzera, ultra-yakakwirira yekupisa conductivity, uye kureruka.Carbon zvinhu zvakaita sedhaimani negraphene zvinongozadzisa zvinodiwa.Vane high thermal conductivity.Zvishandiso zvavo zvakaumbwa imhando yekuitisa kupisa uye kupisa kwekubvisa zvinhu zvine hukuru hwekushandisa, uye dzave iyo yekutarisisa.

 

Kana iwe uchida kuziva zvakawanda nezve nanodiamonds edu, inzwa wakasununguka kubata vashandi vedu.

 


Nguva yekutumira: May-10-2021

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