Thaum tshav ntuj raug rau saum npoo ntawm ib yam khoom, cov khoom feem ntau absorbs ze-infrared lub teeb lub zog kom nws qhov kub thiab txias, thiab ze-infrared lub teeb zog suav txog 50% ntawm tag nrho lub zog ntawm hnub ci.Nyob rau lub caij ntuj sov, thaum lub hnub ci rau saum npoo ntawm cov khoom, qhov kub ntawm qhov chaw tuaj yeem ncav cuag 70 ~ 80 ℃.Lub sijhawm no, lub teeb infrared yuav tsum tau xav txog kom txo qhov kub ntawm qhov khoom;Thaum lub caij ntuj no kub qis, lub teeb infrared yuav tsum tau xa mus rau kev txuag hluav taws xob.Ntawd yog, yuav tsum muaj cov khoom siv ntsuas kub ntse uas tuaj yeem cuam tshuam lub teeb infrared ntawm qhov kub thiab txias, tab sis xa cov teeb infrared ntawm qhov kub thiab txias thiab xa cov teeb pom kev zoo tib lub sijhawm, txhawm rau txuag lub zog thiab tiv thaiv ib puag ncig.
Vanadium dioxide (VO2) yog ib qho oxide nrog theem hloov ua haujlwm ze 68 ° C.Nws yog qhov pom tau tias yog tias VO2 cov khoom siv nrog cov theem hloov pauv ua haujlwm tau muab sib xyaw rau hauv cov khoom siv hauv paus, thiab tom qab ntawd sib xyaw nrog lwm cov xim thiab cov khoom ntim, cov khoom sib xyaw ntse ntsuas kub txheej raws li VO2 tuaj yeem ua tau.Tom qab qhov saum npoo ntawm cov khoom yog coated nrog cov xim zoo li no, thaum qhov kub ntawm sab hauv yog qis, lub teeb infrared tuaj yeem nkag mus rau sab hauv;Thaum qhov kub nce mus rau theem tseem ceeb ntawm kev hloov pauv kub, ib theem hloov pauv tshwm sim, thiab lub teeb infrared transmittance txo qis thiab qhov kub ntawm sab hauv maj mam txo;Thaum qhov kub thiab txias poob rau qee qhov kub, VO2 tau hloov pauv hloov pauv, thiab lub teeb xa hluav taws xob infrared nce ntxiv, yog li paub txog kev tswj qhov kub thiab txias.Nws tuaj yeem pom tau tias tus yuam sij rau kev npaj cov txheej txheem ntsuas qhov ntsuas kub yog los npaj VO2 hmoov nrog theem hloov ua haujlwm.
Ntawm 68 ℃, VO2 hloov pauv sai sai los ntawm qhov kub thiab txias semiconductor, antiferromagnetic, thiab MoO2-zoo li distorted rutile monoclinic theem mus rau high-temperature metallic, paramagnetic, thiab rutile tetragonal theem, thiab VV covalent daim ntawv cog lus hloov pauv. , nthuav tawm lub xeev hlau, cov nyhuv conduction ntawm cov hluav taws xob dawb yog ua kom zoo dua qub, thiab cov khoom siv kho qhov muag hloov pauv loj heev.Thaum qhov kub siab tshaj qhov hloov pauv theem, VO2 yog nyob rau hauv lub xeev hlau, thaj tsam pom lub teeb tseem pob tshab, thaj tsam lub teeb infrared yog qhov zoo heev, thiab lub teeb infrared ib feem ntawm lub hnub ci hluav taws xob raug thaiv sab nraum zoov, thiab kev sib kis ntawm lub teeb infrared me me;Thaum lub ntsiab lus hloov, VO2 nyob rau hauv ib lub xeev semiconductor, thiab cheeb tsam los ntawm pom lub teeb mus rau lub teeb infrared yog nruab nrab pob tshab, tso cai rau feem ntau hnub ci hluav taws xob (xws li pom lub teeb thiab infrared teeb) nkag mus rau hauv chav tsev, nrog high transmittance, thiab qhov kev hloov no yog. thim rov qab.
Rau cov kev siv tswv yim, cov theem hloov pauv kub ntawm 68 ° C tseem siab dhau.Yuav ua li cas txo cov theem hloov mus rau chav tsev kub yog qhov teeb meem uas txhua tus neeg mob siab txog.Tam sim no, txoj hauv kev ncaj qha tshaj plaws los txo cov theem hloov pauv kub yog doping.
Tam sim no, feem ntau ntawm cov txheej txheem rau kev npaj doped VO2 yog unitary doping, uas yog, tsuas yog molybdenum los yog tungsten yog doped, thiab muaj ob peb lus ceeb toom ntawm ib txhij doping ntawm ob lub ntsiab.Doping ob lub ntsiab lus tib lub sijhawm tuaj yeem tsis tsuas yog txo cov theem hloov pauv kub, tab sis kuj txhim kho lwm yam khoom ntawm cov hmoov.