1. Kev tsim cov tshuaj Solvothermal
1. nyoospiv ntawm cov khoom siv
Hmoov zinc thiab hmoov selenium raug sib xyaw ntawm 1: 1 molar ratio, thiab dej deionized lossis ethylene glycol raug ntxiv rau hauv cov kuab tshuaj 35.
2.Cov xwm txheej ntawm kev ua tshuaj tiv thaiv
o Qhov kub ntawm cov tshuaj tiv thaiv: 180-220 ° C
o Lub sijhawm teb: 12-24 teev
o Siab: Tswj qhov siab uas nws tus kheej tsim tawm hauv lub lauj kaub tshuaj tiv thaiv kaw
Qhov kev sib xyaw ua ke ntawm zinc thiab selenium yog ua kom yooj yim los ntawm kev cua sov kom tsim cov nanoscale zinc selenide crystals 35.
3.Cov txheej txheem tom qab kho mob
Tom qab ua tshuaj, nws raug centrifuged, ntxuav nrog dilute ammonia (80 °C), methanol, thiab ziab hauv lub tshuab nqus tsev (120 °C, P₂O₅).btainib hmoov > 99.9% kev huv huv 13.
2. Txoj kev tso pa tshuaj lom neeg
1.Kev kho ua ntej ntawm cov khoom siv raw
o Qhov purity ntawm cov khoom siv zinc raw yog ≥ 99.99% thiab muab tso rau hauv lub graphite crucible
o Cov roj hydrogen selenide raug thauj los ntawm cov roj argon carry6.
2.Kev tswj kub
o Thaj chaw ua kom zinc yaj: 850-900°C
o Thaj chaw tso tawm: 450-500 ° C
Kev tso cov zinc vapor thiab hydrogen selenide los ntawm kev hloov pauv kub 6.
3.Cov roj tsis
o Argon ntws: 5-10 L/min
o Ib feem ntawm qhov siab ntawm hydrogen selenide:0.1-0.3 atm
Cov nqi tso tawm tuaj yeem ncav cuag 0.5-1.2 hli / teev, ua rau muaj 60-100 hli tuab polycrystalline zinc selenide 6..
3. Txoj kev tsim cov khoom siv ncaj qha
1. nyooskev tuav cov khoom siv
Cov tshuaj zinc chloride tau cuam tshuam nrog cov tshuaj oxalic acid los tsim cov zinc oxalate precipitate, uas tau qhuav thiab sib tsoo thiab sib xyaw nrog selenium hmoov ntawm qhov sib piv ntawm 1: 1.05 molar 4.
2.Cov txheej txheem tiv thaiv thermal
o Lub tshuab nqus tsev kub: 600-650°C
o Ua kom sov lub sijhawm: 4-6 teev
Zinc selenide hmoov nrog qhov loj me ntawm 2-10 μm yog tsim los ntawm cov tshuaj tiv thaiv diffusion theem 4.
Kev sib piv ntawm cov txheej txheem tseem ceeb
| txoj kev | Kev piav qhia txog cov khoom lag luam | Qhov loj ntawm cov khoom me me/tuab | Crystallinity | Cov teb ntawm daim ntawv thov |
| Txoj kev Solvothermal 35 | Cov pob nano/rods | 20-100 nm | Cubic sphalerite | Cov khoom siv hluav taws xob Optoelectronic |
| Kev tso pa tawm 6 | Cov pob zeb polycrystalline | 60-100 hli | Cov qauv hexagonal | Cov khoom siv infrared |
| Txoj kev kho theem khov kho 4 | Cov hmoov me me micron | 2-10 μm | Theem cubic | Cov khoom siv ua ntej infrared |
Cov ntsiab lus tseem ceeb ntawm kev tswj cov txheej txheem tshwj xeeb: txoj kev solvothermal yuav tsum ntxiv cov surfactants xws li oleic acid los tswj cov morphology 5, thiab cov pa tso tawm yuav tsum tau qhov roughness ntawm cov substrate kom
1. Kev tso pa tawm ntawm lub cev (PVD).
1.Txoj Kev Siv Tshuab
o Cov khoom siv zinc selenide raw yog vaporized nyob rau hauv ib puag ncig nqus tsev thiab tso rau ntawm qhov chaw substrate siv sputtering lossis thermal evaporation technology12.
o Cov qhov chaw ua kom cov zinc thiab selenium yaj tau raug cua sov rau ntau qhov kub sib txawv (cheeb tsam ua kom cov zinc yaj: 800–850 °C, cheeb tsam ua kom cov selenium yaj: 450–500 °C), thiab qhov piv ntawm stoichiometric raug tswj los ntawm kev tswj tus nqi ua kom cov evaporation ceev.12.
2.Kev tswj hwm parameter
o Lub Tshuab Nqus Tsev: ≤1 × 10⁻³ Pa
o Qhov kub thiab txias: 200–400°C
o Tus nqi tso tawm:0.2–1.0 nm/s
Cov yeeb yaj kiab zinc selenide nrog cov tuab ntawm 50–500 nm tuaj yeem npaj rau kev siv hauv infrared optics 25.
2Txoj kev sib tsoo pob tshuab
1.Kev tswj cov khoom siv raw
o Hmoov Zinc (purity≥99.9%) yog sib xyaw nrog hmoov selenium ntawm qhov sib piv molar 1: 1 thiab muab tso rau hauv lub thawv zeb pob stainless hlau 23.
2.Cov txheej txheem tsis
o Lub sijhawm sib tsoo pob: 10–20 teev
Ceev: 300-500 rpm
o Pellet piv: 10: 1 (zirconia sib tsoo pob).
Cov nanoparticles zinc selenide nrog qhov loj me ntawm 50–200 nm tau tsim los ntawm kev sib xyaw ua ke, nrog qhov huv ntawm >99% 23.
3. Txoj kev kub nias sintering
1.Kev npaj ua ntej
o Zinc selenide nanopowder (qhov loj me < 100 nm) synthesized los ntawm solvothermal txoj kev ua raw khoom 4.
2.Cov kev teeb tsa sintering
Kub: 800–1000°C
o Siab: 30–50 MPa
o Khaws kom sov: 2–4 teev
Cov khoom muaj qhov ceev ntawm > 98% thiab tuaj yeem ua tiav rau hauv cov khoom siv kho qhov muag loj xws li cov qhov rai infrared lossis cov iav 45.
4. Lub teeb molecular epitaxy (MBE).
1.Ib puag ncig nqus tsev siab heev
o Lub Tshuab Nqus Tsev: ≤1 × 10⁻⁷ Pa
o Cov zinc thiab selenium molecular beams tswj hwm qhov ntws los ntawm lub electron beam evaporation source6.
2.Cov kev loj hlob tsis zoo
o Qhov kub ntawm lub hauv paus: 300–500°C (Feem ntau siv GaAs lossis sapphire substrates).
o Kev loj hlob sai:0.1–0.5 nm/s
Cov yeeb yaj kiab nyias nyias zinc selenide ib leeg tuaj yeem npaj tau hauv qhov tuab ntawm 0.1–5 μm rau cov khoom siv optoelectronic siab heev 56.
Lub sijhawm tshaj tawm: Plaub Hlis-23-2025