Hexagonal boron nitride (hBN) yog ib qho zoo kawg nkaus compound uas muaj boron thiab nitrogen atoms teem nyob rau hauv ib tug hexagonal lattice qauv, zoo li graphene. Feem ntau hu ua "dawb graphene" vim nws cov qauv zoo ib yam li graphene thiab nws cov xim dawb, hBN nthuav tawm ntau yam khoom zoo nkauj, ua rau nws muaj ntau yam khoom siv rau ntau yam kev siv. Ib qho ntawm nws cov yam ntxwv tseem ceeb ntawm kev txaus siab hauv kev siv hluav taws xob yog nws qhov dielectric tas li.
Lub dielectric tas li, tseem hu ua tus txheeb ze permittivity, yog cov cuab yeej tseem ceeb ntawm cov ntaub ntawv uas ntsuas lawv lub peev xwm khaws hluav taws xob hauv hluav taws xob. Nws yog ib tug dimensionless kom muaj nuj nqis sawv cev rau qhov piv ntawm hluav taws xob teb nyob rau hauv lub nqus tsev vacuum rau hluav taws xob teb nyob rau hauv cov khoom. Qhov siab dua dielectric tas li qhia tau tias muaj peev xwm khaws tau hluav taws xob ntau dua.
Hexagonal boron nitride, nyob rau hauv nws ntau yam crystalline cov ntaub ntawv, qhia ib tug dielectric tas li uas yog kuj siab piv rau ntau lwm yam ntaub ntawv insulating. Kub, siab, thiab cov qauv crystalline meej ntawm hBN yog ob peb qhov sib txawv uas tuaj yeem cuam tshuam rau tus nqi tshwj xeeb. Feem ntau poob rau hauv thaj tsam ntawm 3 txog 5, lub dielectric qhov tsis tu ncua ntawm hBN underscores nws cov kev ua tau zoo raws li cov khoom siv dielectric.
Cov cuab yeej no ua rau hBN tshwj xeeb tshaj yog muaj txiaj ntsig hauv kev siv hluav taws xob uas cov ntaub ntawv insulating tseem ceeb heev. Muaj ntau qhov laj thawj rau nws txoj kev saws me nyuam raws li cov khoom siv dielectric hauv transistors thiab lwm yam khoom siv hluav taws xob. Ua ntej, hexagonal boron nitride muaj cov thermal conductivity zoo heev, ua kom muaj txiaj ntsig zoo ntawm cov cua sov tsim tawm thaum lub sijhawm ua hluav taws xob. Tsis tas li ntawd, nws nthuav tawm cov khoom siv hluav taws xob zoo nkauj, tiv thaiv qhov tsis xav tau ntawm hluav taws xob tam sim no. Cov tshuaj lom neeg ruaj khov ntawm hBN ntxiv txhim kho nws qhov tsim nyog rau kev siv hluav taws xob, vim nws tuaj yeem tiv taus ib puag ncig hnyav.
Cov kws tshawb fawb thiab cov kws tsim qauv txuas ntxiv tshawb nrhiav txoj hauv kev los txhim kho cov khoom ntawm hBN rau ntau yam kev siv hluav taws xob. Nws lub luag haujlwm txuas ntxiv tshaj li cov khoom siv semiconductor ib txwm muaj, nrog rau cov ntawv thov hauv cov thev naus laus zis tshiab. Raws li qhov kev thov rau cov khoom siv hluav taws xob ua tau zoo nce ntxiv, hexagonal boron nitride qhov tshwj xeeb ua ke ntawm cov khoom, suav nrog nws cov dielectric tas li, ua haujlwm nws ua tus neeg sib tw ua tau zoo rau kev txhawb nqa lub peev xwm ntawm cov khoom siv hluav taws xob hauv cov toj roob hauv pes ntawm kev siv tshuab.
