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Hauv kev txhim kho tseem ceeb hauv kev tshawb fawb txog cov khoom siv, cov kws tshawb fawb tau ua tiav ntau yam hauv kev tsim cov khoom siv α-Al2O3 (alpha-alumina), uas yog cov khoom siv uas paub txog nws cov yam ntxwv tshwj xeeb thiab kev siv dav dav. Qhov no los tom qab Amrute et al. tau thov ua ntej hauv lawv daim ntawv tshaj tawm xyoo 2019, uas tau hais tias tsis muaj txoj hauv kev uas twb muaj lawm tuaj yeem tsim α-Al2O3 nrog ob qho tib si purity siab thiab thaj chaw saum npoo av tshaj qhov txwv. Lawv cov kev tshawb pom tau tsa kev txhawj xeeb txog cov kev txwv ntawm cov txheej txheem tsim khoom tam sim no thiab cov teeb meem rau kev lag luam uas vam khom cov khoom siv tseem ceeb no.
Alpha-alumina yog ib hom txhuas oxide uas muaj nqis heev rau nws qhov nyuaj, kev ruaj khov thermal, thiab cov khoom rwb thaiv hluav taws xob. Nws yog siv dav hauv ntau yam kev siv, suav nrog ceramics, abrasives, thiab ua lub substrate hauv cov khoom siv hluav taws xob. Qhov kev thov rau α-Al2O3 purity siab tau nce siab, tshwj xeeb tshaj yog nyob rau hauv cov teb ntawm cov khoom siv hluav taws xob thiab cov khoom siv ceramics siab heev, qhov twg cov khoom tsis huv tuaj yeem cuam tshuam rau kev ua tau zoo thiab kev ntseeg siab.
Daim ntawv tshaj tawm xyoo 2019 los ntawm Amrute et al. tau hais txog cov teeb meem uas cov kws tshawb fawb thiab cov chaw tsim khoom ntsib hauv kev ua tiav cov qib kev huv si thiab cov yam ntxwv ntawm thaj chaw. Lawv tau sau tseg tias cov txheej txheem ib txwm muaj, xws li cov txheej txheem sol-gel thiab hydrothermal synthesis, feem ntau ua rau cov ntaub ntawv uas tsis ua raws li cov qauv siab uas xav tau rau cov ntawv thov tshiab. Qhov kev txwv no tau ua rau muaj kev cuam tshuam rau kev tsim kho tshiab thiab kev txhim kho hauv ntau lub lag luam high-tech.
Txawm li cas los xij, kev nce qib tsis ntev los no tau pib daws cov teeb meem no. Kev sib koom tes tshawb fawb uas muaj cov kws tshawb fawb los ntawm ntau lub tsev kawm ntawv tau ua rau muaj kev tsim cov txheej txheem tshiab uas sib xyaw cov txheej txheem siab heev los tsim cov α-Al2O3 uas muaj kev ntshiab siab nrog cov cheeb tsam zoo dua. Txoj hauv kev tshiab no siv kev sib xyaw ua ke ntawm kev sib xyaw ua ke ntawm microwave-assisted synthesis thiab cov txheej txheem calcination tswj hwm, uas tso cai rau kev tswj hwm zoo dua ntawm cov khoom siv.
Cov kws tshawb nrhiav tau tshaj tawm tias lawv txoj kev tsis yog tsuas yog ua tiav cov qib purity siab xwb tab sis kuj ua rau α-Al2O3 nrog thaj chaw saum npoo uas ntau dua li cov uas tau tshaj tawm ua ntej hauv cov ntaub ntawv. Qhov kev tshawb pom no muaj peev xwm qhib txoj hauv kev tshiab rau kev siv α-Al2O3 hauv ntau yam kev siv, tshwj xeeb tshaj yog hauv kev lag luam hluav taws xob, qhov twg qhov kev thov rau cov ntaub ntawv ua tau zoo siab zuj zus.
Ntxiv rau nws cov ntawv thov hauv cov khoom siv hluav taws xob, α-Al2O3 uas muaj kev ntshiab siab kuj tseem ceeb heev rau kev tsim cov khoom siv ceramics siab heev, uas siv rau hauv ntau yam lag luam, suav nrog aerospace, automotive, thiab biomedical. Lub peev xwm los tsim α-Al2O3 nrog cov khoom zoo dua tuaj yeem ua rau kev tsim cov khoom siv tshiab uas sib dua, muaj zog dua, thiab tiv taus kev hnav thiab xeb ntau dua.
Cov ntsiab lus ntawm kev tshawb fawb no nthuav dav tshaj qhov tsuas yog tsim cov khoom siv xwb. Lub peev xwm los tsim cov α-Al2O3 uas muaj kev ntshiab siab nrog cov cheeb tsam zoo dua kuj tseem tuaj yeem ua rau muaj kev nce qib hauv catalysis thiab kev siv ib puag ncig. Piv txwv li, α-Al2O3 feem ntau yog siv los ua cov khoom txhawb nqa catalyst hauv cov tshuaj lom neeg, thiab kev txhim kho nws cov khoom tuaj yeem txhim kho kev ua haujlwm zoo thiab kev ua haujlwm ntawm ntau yam txheej txheem catalytic.
Ntxiv mus, txoj kev tsim cov khoom tshiab no yuav ua rau muaj kev tshawb fawb ntxiv rau lwm cov theem txhuas oxide thiab lawv cov kev siv tau. Thaum cov kws tshawb fawb txuas ntxiv tshawb nrhiav cov khoom thiab tus cwj pwm ntawm cov ntaub ntawv no, muaj kev txaus siab rau lawv siv rau hauv kev khaws cia lub zog, kev kho ib puag ncig, thiab txawm tias hauv kev tsim cov roj teeb tiam tom ntej.
Cov kev tshawb pom los ntawm kev tshawb fawb tsis ntev los no tau muab luam tawm hauv phau ntawv xov xwm txog kev tshawb fawb txog cov khoom siv, qhov chaw uas lawv tau txais kev saib xyuas los ntawm ob lub koom haum kev kawm thiab kev lag luam. Cov kws tshaj lij hauv daim teb no tau qhuas txoj haujlwm no ua ib kauj ruam tseem ceeb hauv kev kov yeej cov kev txwv uas Amrute et al. tau txheeb xyuas thiab tau qhia kev cia siab txog yav tom ntej ntawm α-Al2O3 kev tsim khoom.
Raws li qhov kev thov rau cov ntaub ntawv ua tau zoo txuas ntxiv mus, lub peev xwm los tsim cov khoom siv α-Al2O3 uas muaj cov khoom zoo dua yuav tseem ceeb heev. Qhov kev tshawb pom no tsis yog tsuas yog daws cov teeb meem uas tau hais tseg hauv kev tshawb fawb yav dhau los xwb tab sis kuj teeb tsa theem rau kev tsim kho tshiab ntxiv hauv kev tshawb fawb txog cov ntaub ntawv. Kev koom tes ntawm cov kws tshawb fawb thiab cov neeg koom nrog hauv kev lag luam yuav tseem ceeb hauv kev txhais cov kev tshawb pom no rau hauv cov ntawv thov siv tau uas tuaj yeem pab tau ntau yam kev lag luam.
Xaus lus, qhov kev nce qib tsis ntev los no hauv kev tsim cov α-Al2O3 uas muaj kev ntshiab siab yog ib qho tseem ceeb hauv kev tshawb fawb txog cov khoom siv. Los ntawm kev kov yeej cov teeb meem uas tau txheeb xyuas hauv kev tshawb fawb ua ntej, cov kws tshawb fawb tau qhib cov hauv kev tshiab rau kev siv cov khoom siv no hauv ntau yam kev siv thev naus laus zis siab. Thaum lub teb txuas ntxiv hloov zuj zus, nws yog qhov tseeb tias yav tom ntej ntawm α-Al2O3 thiab nws cov khoom siv tau cog lus zoo rau kev tsim kho tshiab thiab kev txhim kho thoob plaws ntau yam kev lag luam.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-26-2024
