1. Tus nqi evaporation yuav cuam tshuam rau cov khoom ntawm cov txheej evaporated
Qhov evaporation rate muaj feem cuam tshuam loj heev rau cov zaj duab xis uas tau tso tawm. Vim tias cov qauv txheej uas tsim los ntawm qhov low deposition rate yog xoob thiab yooj yim rau kev tsim cov khoom loj loj, nws muaj kev nyab xeeb heev los xaiv qhov evaporation rate siab dua kom ntseeg tau tias cov qauv txheej compact. Thaum lub siab ntawm cov roj seem hauv lub tshuab nqus tsev yog qhov tas li, qhov bombardment rate ntawm lub substrate yog qhov tas li. Yog li ntawd, cov roj seem uas muaj nyob hauv cov zaj duab xis uas tau tso tawm tom qab xaiv qhov evaporation rate siab dua yuav raug txo, yog li txo cov tshuaj tiv thaiv ntawm cov roj seem thiab cov khoom me me ntawm cov zaj duab xis uas tau evaporated. Yog li ntawd, qhov purity ntawm cov zaj duab xis uas tau tso tawm tuaj yeem txhim kho. Nws yuav tsum tau sau tseg tias yog tias qhov evaporation rate ceev dhau, nws yuav ua rau muaj kev ntxhov siab sab hauv ntawm cov zaj duab xis, nws yuav ua rau muaj qhov tsis zoo hauv cov zaj duab xis, thiab txawm tias ua rau cov zaj duab xis tawg. Tshwj xeeb, hauv cov txheej txheem ntawm reactive evaporation plating, txhawm rau ua kom cov roj reaction tag nrho nrog cov khoom me me ntawm cov khoom siv zaj duab xis evaporation, koj tuaj yeem xaiv qhov evaporation qis dua. Tau kawg, cov ntaub ntawv sib txawv xaiv cov evaporation rate sib txawv. Ua piv txwv ua tau zoo - qhov kev tso cov zaj duab xis uas ci ntsa iab, Yog tias zaj duab xis tuab yog 600 × 10-8cm thiab lub sijhawm ua kom qhuav yog 3 vib nas this, qhov kev cuam tshuam yog 93%. Txawm li cas los xij, yog tias qhov kev ua kom qhuav qeeb qeeb nyob rau hauv tib lub tuab, nws yuav siv sijhawm 10 feeb los ua kom tiav cov zaj duab xis. Lub sijhawm no, qhov tuab ntawm zaj duab xis yog tib yam. Txawm li cas los xij, qhov kev cuam tshuam tau poob qis mus rau 68%.
2. Qhov kub ntawm cov khoom siv yuav cuam tshuam rau cov txheej txheem evaporation
Qhov kub ntawm lub substrate muaj feem cuam tshuam loj heev rau qhov txheej evaporation. Cov roj molecule seem uas adsorbed rau ntawm qhov chaw substrate ntawm qhov kub siab substrate yooj yim tshem tawm. Tshwj xeeb tshaj yog qhov tseem ceeb tshaj plaws yog kev tshem tawm cov dej vapor molecule. Ntxiv mus, thaum kub siab dua, nws tsis yog tsuas yog yooj yim los txhawb kev hloov pauv ntawm lub cev adsorption mus rau tshuaj adsorption, yog li ua rau lub zog khi ntawm cov khoom me me. Ntxiv mus, nws kuj tseem tuaj yeem txo qhov sib txawv ntawm qhov kub recrystallization ntawm cov pa molecule thiab qhov kub ntawm lub substrate, yog li txo lossis tshem tawm kev ntxhov siab sab hauv ntawm qhov interface raws li zaj duab xis. Tsis tas li ntawd, vim tias qhov kub ntawm lub substrate muaj feem cuam tshuam nrog lub xeev crystalline ntawm zaj duab xis, nws feem ntau yooj yim los tsim cov txheej amorphous lossis microcrystalline nyob rau hauv qhov xwm txheej ntawm qhov kub qis substrate lossis tsis muaj cua sov. Ntawm qhov tsis sib xws, thaum qhov kub siab, nws yooj yim los tsim cov txheej crystalline. Kev nce qhov kub ntawm lub substrate kuj tseem pab txhim kho cov khoom siv kho tshuab ntawm cov txheej. Tau kawg, qhov kub ntawm lub substrate yuav tsum tsis txhob siab dhau los tiv thaiv kev evaporation ntawm cov txheej.
3. Cov roj seem nyob hauv lub tshuab nqus tsev yuav cuam tshuam rau cov khoom ntawm zaj duab xis
Qhov siab ntawm cov roj seem hauv lub tshuab nqus tsev muaj feem cuam tshuam loj heev rau kev ua haujlwm ntawm daim nyias nyias. Cov roj seem uas muaj siab dhau tsis yog tsuas yog yooj yim sib tsoo nrog cov khoom me me, uas yuav txo qhov zog kinetic ntawm cov neeg nyob rau ntawm lub substrate thiab cuam tshuam rau qhov lo rau ntawm zaj duab xis. Tsis tas li ntawd, qhov siab ntawm cov roj seem siab dhau yuav cuam tshuam rau qhov huv ntawm zaj duab xis thiab txo qhov kev ua haujlwm ntawm cov txheej.
4. Qhov kub ntawm cov dej noo uas cuam tshuam rau cov txheej txheem evaporation
Qhov cuam tshuam ntawm qhov kub ntawm kev ua pa rau kev ua haujlwm ntawm daim nyias nyias yog qhia los ntawm kev hloov pauv ntawm qhov nrawm ntawm kev ua pa nrog qhov kub thiab txias. Thaum qhov kub ntawm kev ua pa siab, qhov kub ntawm kev ua pa yuav txo qis. Yog tias cov khoom siv daim nyias nyias raug ua pa siab dua qhov kub ntawm kev ua pa, txawm tias qhov hloov pauv me ntsis ntawm qhov kub thiab txias tuaj yeem ua rau muaj kev hloov pauv ntawm qhov nrawm ntawm kev ua pa ntawm cov khoom siv daim nyias nyias. Yog li ntawd, nws yog ib qho tseem ceeb heev uas yuav tsum tswj qhov kub ntawm kev ua pa kom raug thaum lub sijhawm tso cov yeeb yaj kiab kom tsis txhob muaj qhov kub thiab txias loj thaum lub hauv paus ntawm kev ua pa raug cua sov. Rau cov khoom siv zaj duab xis uas yooj yim rau sublimate, nws tseem ceeb heev uas yuav tsum xaiv cov khoom siv nws tus kheej ua lub cua sov rau kev ua pa thiab lwm yam kev ntsuas.
5. Kev ntxuav lub xeev ntawm cov khoom siv thiab cov chav txheej yuav cuam tshuam rau kev ua haujlwm ntawm cov txheej txheem
Qhov cuam tshuam ntawm qhov huv ntawm lub substrate thiab lub chamber txheej rau kev ua haujlwm ntawm cov txheej tsis tuaj yeem tsis quav ntsej. Nws yuav tsis tsuas yog cuam tshuam rau qhov huv ntawm cov zaj duab xis uas tau tso tawm, tab sis kuj txo qhov kev nplaum ntawm cov zaj duab xis. Yog li ntawd, kev ntxuav cov substrate, kev kho kom huv ntawm lub chamber txheej nqus tsev thiab nws cov khoom cuam tshuam (xws li lub thav duab substrate) thiab kev tshem tawm cov pa roj ntawm qhov chaw yog cov txheej txheem tseem ceeb hauv cov txheej txheem txheej nqus tsev.
Lub sijhawm tshaj tawm: Lub Ob Hlis-28-2023