Tam sim no, ob qho tib si kev tsim khoom thiab kev siv nanomaterials tau nyiam los ntawm ntau lub teb chaws. Tuam Tshoj nanotechnology tseem ua tau zoo, thiab kev tsim khoom lag luam lossis kev sim ntau lawm tau ua tiav hauv nanoscale SiO2, TiO2, Al2O3, ZnO2, Fe2O3 thiab lwm yam khoom siv hmoov. Txawm li cas los xij, cov txheej txheem tsim khoom tam sim no thiab cov nqi tsim khoom siab yog nws qhov tsis muaj zog txaus, uas yuav cuam tshuam rau kev siv ntau ntawm nanomaterials. Yog li ntawd, kev txhim kho txuas ntxiv yog tsim nyog.
Vim muaj cov qauv hluav taws xob tshwj xeeb thiab loj atomic radius ntawm lub ntiaj teb tsis tshua muaj cov ntsiab lus, lawv cov khoom siv tshuaj muaj zog sib txawv ntawm lwm cov khoom. Yog li ntawd, txoj kev npaj thiab kev kho mob tom qab kev siv tshuab ntawm lub ntiaj teb tsis tshua muaj nano oxides kuj txawv ntawm lwm yam. Cov kev tshawb fawb tseem ceeb muaj xws li:
1. Cov txheej txheem nag lossis daus: suav nrog oxalic acid nag lossis daus, carbonate nag lossis daus, hydroxide nag lossis daus, homogeneous nag lossis daus, thiab lwm yam. Qhov loj tshaj plaws ntawm txoj kev no yog cov tshuaj nucleates sai, yooj yim los tswj, cov cuab yeej siv tau yooj yim, thiab tuaj yeem tsim tau. high-purity khoom. Tab sis nws yog ib qho nyuaj rau lim thiab yooj yim rau aggregate.
2. Hydrothermal txoj kev: Ua kom nrawm thiab ntxiv dag zog rau cov tshuaj tiv thaiv hydrolysis ntawm ions nyob rau hauv qhov kub thiab txias, thiab tsim cov nanocrystalline nuclei dispersed. Txoj kev no tuaj yeem tau txais cov hmoov nanometer nrog cov khoom tawg yooj yim thiab nqaim particle loj faib, tab sis nws yuav tsum muaj cov khoom siv kub thiab kub siab, uas yog kim thiab tsis zoo rau kev khiav lag luam.
3. gel method: Nws yog ib txoj hauv kev tseem ceeb rau kev npaj cov ntaub ntawv inorganic, thiab plays lub luag haujlwm tseem ceeb hauv inorganic synthesis. Thaum tsis tshua muaj kub, organometallic tebchaw los yog organic complexes tuaj yeem tsim sol los ntawm polymerization los yog hydrolysis, thiab tsim gel nyob rau hauv tej yam kev mob. Kev kho cua sov ntxiv tuaj yeem tsim cov noodles ultrafine nrog qhov tshwj xeeb loj dua thiab zoo dua dispersion. Txoj kev no tuaj yeem ua tau raws li qhov mob me me, ua rau cov hmoov av nrog thaj tsam loj dua thiab zoo dua dispersibility. Txawm li cas los xij, cov tshuaj tiv thaiv lub sijhawm ntev thiab siv sijhawm ntau hnub los ua kom tiav, ua rau nws nyuaj rau kev ua kom tau raws li qhov xav tau ntawm kev lag luam.
4. Khoom theem txheej txheem: high-temperature decomposition yog nqa tawm los ntawm cov khoom sib txuas los yog cov theem nruab nrab ntawm cov khoom sib cuam tshuam. Piv txwv li, lub ntiaj teb tsis tshua muaj nitrate thiab oxalic acid yog tov los ntawm cov khoom theem pob zeb milling los ua ib qho nruab nrab ntawm lub ntiaj teb tsis tshua muaj oxalate, uas yog tom qab ntawd decomposed ntawm qhov kub thiab txias kom tau txais ultrafine hmoov. Txoj kev no muaj cov tshuaj tiv thaiv siab, cov cuab yeej siv yooj yim, thiab kev ua haujlwm yooj yim, tab sis cov hmoov ua tau zoo tsis tu ncua morphology thiab tsis zoo ib yam.
Cov txheej txheem no tsis yog tshwj xeeb thiab tej zaum yuav tsis muaj feem xyuam rau industrialization. Kuj tseem muaj ntau txoj kev npaj, xws li cov txheej txheem organic microemulsion, alcoholysis, thiab lwm yam.
Yog xav paub ntxiv pls xav tiv tauj peb
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Post lub sij hawm: Apr-06-2023