Hauv crystallography, cov qauv pob zeb diamond tseem hu ua pob zeb diamond cubic siv lead ua qauv, uas yog tsim los ntawm covalent bonding ntawm carbon atoms.Ntau lub zog ntawm pob zeb diamond yog qhov tshwm sim ncaj qha ntawm sp³ covalent daim ntawv cog lus lub zog uas tsim cov qauv nruj thiab cov pa roj carbon tsawg tsawg.Hlau ua cov cua sov los ntawm cov hluav taws xob dawb, thiab nws cov thermal conductivity yog txuam nrog hluav taws xob conductivity siab.Nyob rau hauv sib piv, kub conduction nyob rau hauv pob zeb diamond tsuas yog ua tiav los ntawm lattice vibrations (ie, phonons).Cov kev sib cog lus muaj zog heev ntawm cov pob zeb diamond atoms ua rau cov iav siv lead ua khov kho muaj qhov kev vibration siab, yog li nws tus yam ntxwv Debye kub yog siab li 2,220 K.

Txij li feem ntau cov ntawv thov qis dua qhov Debye kub, qhov phonon tawg yog me me, yog li cov cua kub conduction kuj nrog phonon raws li qhov nruab nrab me me.Tab sis txhua lub lattice defect yuav tsim phonon scattering, yog li txo cov thermal conductivity, uas yog tus yam ntxwv ntawm tag nrho cov khoom siv lead ua.Qhov tsis xws ntawm pob zeb diamond feem ntau suav nrog cov ntsiab lus tsis xws luag xws li hnyav dua ˡ³C isotopes, nitrogen impurities thiab cov chaw ua haujlwm, ncua kev tsis xws luag xws li stacking faults thiab dislocations, thiab 2D tsis xws luag xws li lis ciam teb.

Lub pob zeb diamond siv lead ua muaj cov qauv tetrahedral tsis tu ncua, nyob rau hauv uas tag nrho 4 ib leeg ntawm cov pa roj carbon atoms tuaj yeem tsim covalent bonds, yog li tsis muaj hluav taws xob dawb, yog li pob zeb diamond tsis tuaj yeem ua hluav taws xob.

Tsis tas li ntawd, cov pa roj carbon atoms hauv pob zeb diamond txuas nrog plaub-valent bonds.Vim hais tias CC daim ntawv cog lus nyob rau hauv pob zeb diamond muaj zog heev, tag nrho cov valence electrons koom nyob rau hauv lub tsim ntawm covalent daim ntawv cog lus, tsim ib tug pyramid-zoo li tus siv lead ua qauv, yog li lub hardness ntawm pob zeb diamond yog siab heev thiab lub melting point yog siab.Thiab cov qauv ntawm pob zeb diamond no kuj ua rau nws nqus tau ob peb lub teeb bands, feem ntau ntawm lub teeb irradiated ntawm lub pob zeb diamond yog tshwm sim tawm, yog li txawm tias nws nyuaj heev, nws zoo li pob tshab.

Tam sim no, cov khoom siv hluav taws xob nrov tshaj plaws yog cov tswv cuab ntawm cov khoom siv nano-carbon tsev neeg, suav nrognanodiamond, nano-graphene, graphene flakes, flake-shaped nano-graphite hmoov, thiab carbon nanotubes.Txawm li cas los xij, tej yam ntuj tso graphite tshav kub dissipation zaj duab xis cov khoom yog thicker thiab muaj thermal conductivity tsawg, uas yog ib qho nyuaj rau ua tau raws li lub tshav kub dissipation yuav tsum tau rau yav tom ntej high-power, high-kev koom ua ke-density li.Nyob rau tib lub sijhawm, nws tsis ua raws li tib neeg txoj kev ua haujlwm siab rau ultra-lub teeb thiab nyias, roj teeb lub neej ntev.Yog li ntawd, nws yog ib qho tseem ceeb heev kom nrhiav tau cov khoom tshiab super-thermal conductive.Qhov no yuav tsum muaj cov ntaub ntawv zoo li no kom muaj cov thermal expansion tsawg heev, ultra-siab thermal conductivity, thiab lightness.Cov khoom siv carbon xws li pob zeb diamond thiab graphene tsuas yog ua tau raws li qhov yuav tsum tau ua.Lawv muaj siab thermal conductivity.Lawv cov ntaub ntawv sib xyaw yog cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob uas muaj peev xwm ua tau zoo, thiab lawv tau dhau los ua qhov tseem ceeb ntawm kev mloog.

Yog tias koj xav paub ntau ntxiv txog peb cov nanodiamonds, thov hu rau peb cov neeg ua haujlwm.