Nyob rau xyoo tas los no, raws li kev lag luam ceramics tau nthuav dav los ntawm cov khoom siv hauv tsev thiab cov khoom siv hauv tsev mus rau cov khoom siv ceramics ua haujlwm siab thiab cov khoom siv ceramics ua haujlwm, kev xaiv thiab kev ua kom zoo dua ntawm cov khoom siv hmoov tau dhau los ua qhov tseem ceeb rau kev txhim kho kev lag luam. Raws li ib qho ntawm cov khoom siv raw tseem ceeb tshaj plaws hauv kev lag luam ceramics niaj hnub no,alumina hmoov (Al₂O₃) tab tom nkag mus rau hauv lub kaw lus tsim khoom ntawm cov khoom siv ceramics uas muaj nqi ntxiv nrog kev ntshiab dua, qhov loj me me dua, thiab cov yam ntxwv ntawm cov khoom siv crystal ruaj khov dua, muab kev txhawb nqa tseem ceeb rau cov khoom siv kho tshuab, hluav taws xob, thiab kev tiv thaiv corrosion ntawm cov khoom siv ceramic.
Ⅰ. Cov yam ntxwv thiab kev faib tawm ntawm Alumina Hmoov
Feem ntau, cov hmoov alumina raug faib ua pawg raws li kev huv, cov qauv siv lead ua (α-theem lossis γ-theem), qhov loj me ntawm cov khoom me me, qhov sib npaug, thiab cov yam ntxwv sintering. Cov hmoov alumina siv rau hauv cov khoom siv ceramics ib txwm muaj feem ntau tsom mus rau kev huv ib txwm thiab cov khoom loj dua, thaum cov hmoov siv rau hauv cov khoom siv ceramics thiab cov khoom siv hluav taws xob feem ntau yog qib siab, qib ultra-fine lossis qib sub-micron, thiab feem ntau siv α-alumina crystal theem kom ntseeg tau tias cov khoom siv lead ua ruaj khov thiab lub zog ntawm lub cev ceramic thaum lub sijhawm kub siab sintering.
Qhov kev faib tawm ntawm qhov loj ntawm cov khoom me me yog suav tias yog ib qho ntawm cov yam tseem ceeb uas txiav txim siab txog kev ua tau zoo ntawm cov khoom siv ceramic. Qhov loj ntawm cov khoom me me uas loj dhau ua rau lub cev ceramic tsis txaus, thaum qhov loj ntawm cov khoom me me uas me dhau tuaj yeem ua rau cov noob tsis sib xws lossis cov qhov tsis zoo thaum lub sijhawm sintering. Hauv kev lag luam ntawm cov khoom siv hluav taws xob ceramics thiab cov qauv siab heevcov khoom siv av nplaum, kev tswj hwm qhov loj me ntawm cov khoom me me D50 thiab D90 nruj dua, nrog rau kev faib tawm qhov loj me ntawm cov khoom me me, tau dhau los ua qhov sib txawv hauv kev txhim kho kev lag luam.
Ⅱ. Cov Ntawv Thov Nthuav Dav Hauv Cov Khoom Siv Ua Los Ntawm Cov Khoom Uas Muaj Cov Qauv
Hmoov alumina yog cov khoom siv ceramic uas laus tshaj plaws hauv kev ua cov khoom siv ceramic, muaj cov yam ntxwv xws li lub zog siab, lub zog tawv, kev tiv thaiv kev hnav, kev tiv thaiv corrosion, thiab kev tiv thaiv kub siab. Cov ntawv thov feem ntau suav nrog cov bearings, nozzles, guide rollers, mechanical seals, valve bodies, wear-resistant liners, thiab cov cuab yeej txiav. Nrog rau kev thov ntau ntxiv rau cov khoom siv hnav-resistant hauv kev lag luam tsim khoom thiab khoom siv, kev ua lag luam rau alumina structural ceramics tab tom nthuav dav, tshwj xeeb tshaj yog hauv kev khawb hlau, kev lag luam tshuaj lom neeg thee, thiab kev ua haujlwm precision, qhov twg qhov hloov pauv ntawmalumina ceramicsyog qhov tseem ceeb.
Tam sim no, qhov huv siab thiab qhov ceev yog cov cim qhia tseem ceeb ntawm kev tsom mus rau kev lag luam. Hauv kev kub siab sintering, qhov siab dua qhov huv ntawm cov hmoov, qhov sib npaug ntau dua qhov kev loj hlob ntawm cov noob siv lead ua, thiab qhov siab dua qhov khoom muaj zog thiab qhov tawg toughness, yog li txhim kho lub neej hnav tag nrho thiab kev ruaj khov. Lub caij no, kev siv cov hmoov alumina spherical thiab cov hmoov submicron hauv kev ua cov khoom siv ceramics nce ntxiv, ua tsaug rau lawv cov dej ntws zoo heev thiab sintering sib xws.
Ⅲ. Tus nqi thev naus laus zis hauv cov khoom siv hluav taws xob thiab hluav taws xob ceramics
Cov khoom siv hluav taws xob yog ib qho ntawm cov teb uas muaj peev xwm loj tshaj plaws rau alumina hmoov. Alumina ceramics muaj cov khoom rwb thaiv tsev zoo heev thiab dielectric, ua rau lawv haum rau cov khoom siv ntim khoom sib xyaw ua ke, cov insulators siab zaus, cov khoom siv cua sov dissipation, thiab cov khoom siv rwb thaiv tsev fais fab. Kev txhim kho sai ntawm cov khoom siv hluav taws xob fais fab thiab kev sib txuas lus siab zaus tau tsav tsheb kev txhim kho tas mus li ntawm kev poob dielectric thiab thermal conductivity ntawm cov ntaub ntawv ceramic substrate. Cov khoom siv ceramic alumina purity siab tau dhau los ua cov khoom siv tseem ceeb hauv cov modules fais fab thiab cov teb semiconductor.
Hauv kev lag luam ntawm LED cua sov dissipation substrates, cov ceramic substrates ua los ntawm alumina hmoov muaj cov thermal conductivity zoo thiab hluav taws xob rwb thaiv tsev, muab kev txhawb nqa txhim khu kev qha rau cov khoom siv hluav taws xob siab LED. Nrog rau kev tsim khoom loj ntawm cov tsheb fais fab tshiab, cov pawg them hluav taws xob, thiab cov khoom siv khaws cia hluav taws xob, qhov kev thov rau cov ntaub ntawv ceramic substrate rau cov khoom siv fais fab tau nkag mus rau hauv lub voj voog loj hlob, coj cov sijhawm lag luam ruaj khov thiab ntev rau alumina hmoov.
Ⅳ. Cov txiaj ntsig ib txwm muaj hauv Refractory thiab Catalytic Ceramics
Cov ntaub ntawv refractory ib txwm tseem yog ib qho chaw siv tseem ceeb rau alumina hmoov. Vim nws qhov chaw yaj siab thiab muaj zog tiv taus corrosion tshuaj, alumina hmoov tuaj yeem siv los tsim cov qhov cub kub kub, crucibles, nozzle bricks, thiab cov khoom sib cuag hlau molten. Cov lag luam kub siab xws li hlau, cov hlau tsis yog ferrous, thiab kev tsim khoom wafer integrated circuit tseem yog cov neeg siv tseem ceeb ntawm alumina refractory ceramics.
Lwm qhov chaw paub tab yog cov khoom siv catalytic carrier ceramics, xws li honeycomb ceramics thiab alumina catalytic carriers. Thaj chaw tshwj xeeb thiab cov qauv porous ntawmalumina hmoovmuab lub hauv paus zoo rau cov khoom siv catalytic, thiab siv dav hauv kev kho cov pa tawm hauv tsheb, kev tawg catalytic hauv chaw ua roj, thiab cov txheej txheem denitrification ib puag ncig.
Ⅴ. Kev Txhim Kho Txoj Kev Ua Haujlwm thiab Txoj Kev Siv Tshuab Hauv Kev Lag Luam
Nrog rau kev txhim kho thev naus laus zis ntawm kev lag luam ceramic, cov chaw tsim khoom hmoov alumina tab tom hloov pauv los ntawm cov txheej txheem tshuaj lom neeg ib txwm muaj mus rau kev tsuag kom qhuav, isostatic nias, thermal plasma spheroidization, thiab cov thev naus laus zis hloov kho qhov chaw. Ntawm ib sab tes, cov khoom me me thiab cov hmoov ntshiab siab dua txuas ntxiv txhim kho kev ua tau zoo sintering; ntawm qhov tod tes, cov thev naus laus zis hloov kho txhim kho qhov sib xws ntawm cov hmoov nrog cov khi thiab cov txheej txheem kuab tshuaj, pab txhawb kev tswj hwm rheological ntawm cov khoom siv ceramic slurries thiab txhaj tshuaj molding. Nws yog ib qho tsim nyog sau tseg tias nyob rau hauv xyoo tas los no, qhov kev thov rau kev ua khoom siv hauv kev lag luam ceramics tau nce tib lub sijhawm. Kev txhim kho hauv qhov tseeb ntawm kev ua cov khoom siv ceramic nto tau ua rau muaj cov hmoov av morphology tsis tu ncua, thiab cov hmoov alumina spherical tau nkag mus rau hauv cov teb ntawm kev polishing optical thiab wafer fabrication, coj cov ntsiab lus tshiab rau cov tuam txhab hmoov.
Ⅵ. Cov Qauv Kev Lag Luam: Kev Txhim Kho Cov Khoom Siv Tsav Kev Hloov Pauv hauv Kev Lag Luam
Vim yog cov qauv khoom siv ntawm "kev sib dua, kev ua haujlwm siab, thiab kev siv hluav taws xob," cov khoom siv ceramics ua tau zoo tau txais txoj haujlwm zoo dua. Cov kev taw qhia txog kev siv tshuab ntawm kev lag luam tsheb, kev kho mob, lub zog, thiab semiconductor txiav txim siab qhov kev siv hmoov alumina yav tom ntej.
Cov qauv kev lag luam tam sim no qhia peb yam tseem ceeb:
① Cov khoom siv kub thiab kev lag luam hluav taws xob tshiab tab tom nthuav dav qhov kev thov rau cov khoom siv ceramic uas tiv taus thiab rwb thaiv tsev;
② Cov khoom siv hluav taws xob ceramics tab tom dhau los ua qhov chaw ntawm kev thov ntau ntxiv rau cov hmoov purity siab;
③ Kev ua kom zoo dua qhov loj ntawm cov khoom me me, kev txhim kho kev huv, thiab kev ruaj khov ntawm cov khoom siv lead ua ke yog qhov tseem ceeb ntawm kev sib tw hmoov.
Lub ntiaj tebkev lag luam ceramicCov saw hlau tam sim no nyob rau hauv qhov chaw sib tw ntau txheej. Cov tuam txhab hmoov zoo tshaj plaws muaj qhov zoo dua hauv kev siv tshuab hluav taws xob thiab semiconductor, thaum cov hmoov nruab nrab tseem tsom mus rau cov khoom siv ceramic thiab cov ntaub ntawv refractory. Tsav los ntawm kev thov rov qab, kev lag luam hmoov nruab nrab mus rau qib siab yuav tsum tswj hwm kev loj hlob.
Ⅶ. Xaus lus
Qhov sib txawv ntawm kev lag luam ceramic hloov ntawm kev thov ib txwm mus rau kev tsim khoom siab heev yog qhov tseeb heev. Nrog rau kev nthuav dav ntawm cov thev naus laus zis khoom siv, cov txheej txheem npaj, thiab cov xwm txheej siv, alumina hmoov yuav ua lub luag haujlwm tseem ceeb dua hauv kev lag luam ceramic yav tom ntej. Txawm hais tias nws yog cov qauv ceramics, hluav taws xob ceramics, thermal tswj ceramics, lossis catalytic ceramics, cov ntaub ntawv hmoov alumina tau dhau los ua lub zog tseem ceeb rau kev txhim kho ntawm tag nrho cov saw hlau kev lag luam ceramic.