Ku-crystallography, isakhiwo sedayimane sibizwa nangokuthi isakhiwo se-diamond cubic crystal, esakhiwa ukuhlangana okuhlangene kwama-athomu e-carbon.Izakhiwo eziningi ezeqisayo zedayimane ziwumphumela oqondile wamandla ebhondi ye-sp³ eyakha isakhiwo esiqinile kanye nenani elincane lama-athomu ekhabhoni.I-Metal iqhuba ukushisa ngama-electron amahhala, futhi ukuqhutshwa kwayo okuphezulu okushisayo kuhlotshaniswa nokuhamba kagesi okuphezulu.Ngokuphambene, ukuqhutshwa kokushisa kwedayimane kwenziwa kuphela ngokudlidliza kwe-lattice (okungukuthi, amaphononi).Amabhondi aqinile aqinile phakathi kwama-athomu edayimane enza ingilazi yekristalu eqinile ibe nemvamisa yokudlidliza, ngakho-ke izinga lokushisa layo lesici seDebye liphezulu njengo-2,220 K.

 

Njengoba izinhlelo zokusebenza eziningi ziphansi kakhulu kunezinga lokushisa le-Debye, ukuhlakazeka kwephonon kuncane, ngakho-ke ukumelana nokushisa kokushisa ngephonon njengoba okuphakathi kuncane kakhulu.Kodwa noma yikuphi ukukhubazeka kwe-lattice kuzokhiqiza ukuhlakazeka kwe-phonon, ngaleyo ndlela kunciphise ukuqhutshwa kwe-thermal, okuyisici esingokwemvelo kuzo zonke izinto ze-crystal.Amaphutha edayimane ngokuvamile ahlanganisa ukukhubazeka kwamaphoyinti okufana nama-isotopes angu-ˡ³C esindayo, ukungcola kwe-nitrogen nezikhala, amaphutha anwetshiwe afana namaphutha wokupakisha nokuhlukaniswa, kanye nokukhubazeka kwe-2D njengemingcele yokusanhlamvu.

 

Ikristalu yedayimane inesakhiwo esivamile se-tetrahedral, lapho wonke amapheya angu-4 awodwa ama-athomu e-carbon angakha izibopho ezihlangene, ngakho awekho ama-electron amahhala, ngakho idayimane alikwazi ukuqhuba ugesi.

 

Ngaphezu kwalokho, ama-athomu e-carbon edayimane axhunywe ngamabhondi angama-valent amane.Ngenxa yokuthi isibopho se-CC edayimane sinamandla kakhulu, wonke ama-electron e-valence abamba iqhaza ekwakhiweni kwamabhondi aqinile, enza isakhiwo sekristalu esimise okwephiramidi, ngakho-ke ubulukhuni bedayimane buphakeme kakhulu futhi iphuzu lokuncibilika liphezulu.Futhi lesi sakhiwo sedayimane siyenza imunce amabhande okukhanya ambalwa kakhulu, ukukhanya okuningi okukhanyiswe ngedayimane kuboniswa ngaphandle, ngakho nakuba kunzima kakhulu, kubukeka kusobala.

 

Njengamanje, izinto ezithandwa kakhulu zokushisa ukushisa zingamalungu omndeni we-nano-carbon material, kuhlanganisei-nanodiamond, i-nano-graphene, ama-graphene flakes, i-nano-graphite powder emise okwe-flake, nama-carbon nanotubes.Kodwa-ke, imikhiqizo yefilimu yemvelo ye-graphite yokushisa ukushisa iminyene futhi ine-conductivity ephansi ye-thermal, okunzima ukuhlangabezana nezidingo zokulahla ukushisa kwamandla aphezulu wesikhathi esizayo, amadivayisi aphezulu ahlanganisa-ukuminyana.Ngesikhathi esifanayo, ayihlangabezani nezidingo zokusebenza eziphezulu zabantu zokukhanya okukhulu nokuncane, impilo yebhethri ende.Ngakho-ke, kubaluleke kakhulu ukuthola izinto ezintsha ze-super-thermal conductive.Lokhu kudinga izinto ezinjalo ukuthi zibe nezinga lokunweba eliphansi kakhulu le-thermal, i-ultra-high thermal conductivity, nokukhanya.Izinto zekhabhoni ezifana nedayimane negraphene zihlangabezana nezidingo.Zinezinga eliphezulu le-thermal conductivity.Izinto zabo ezihlanganisiwe ziwuhlobo lwe-heat conduction kanye nezinto zokukhipha ukushisa ezinamandla amakhulu okufaka isicelo, futhi ziye zaba ukugxila kokunaka.

 

Uma ungathanda ukwazi okwengeziwe ngama-nanodiamonds ethu, sicela ukhululeke ukuxhumana nabasebenzi bethu.

 


Isikhathi sokuthumela: May-10-2021

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