Kev koom tes tshwj xeeb ntawm alumina hmoov hauv cov khoom sib nqus
Thaum koj disassemble lub siab ceev servo lub cev muaj zog lossis lub zog tsav ntawm lub tsheb tshiab, koj yuav pom tias cov khoom siv hlau nplaum zoo ib txwm nyob ntawm qhov tseem ceeb. Thaum cov engineers tab tom tham txog lub zog quab yuam thiab qhov seem ntawm lub zog sib nqus ntawm cov hlau nplaum, ob peb tus neeg yuav pom tias zoo li cov hmoov dawb dawb,alumina hmoov(Al₂O₃), ntsiag to ua lub luag haujlwm ntawm "tus phab ej tom qab". Nws tsis muaj hlau nplaum, tab sis nws tuaj yeem hloov qhov kev ua tau zoo ntawm cov khoom sib nqus; nws tsis yog-conductive, tab sis nws muaj kev cuam tshuam loj heev rau kev hloov dua siab tshiab ntawm tam sim no. Hauv kev lag luam niaj hnub no uas ua raws li qhov kawg ntawm cov khoom sib nqus, qhov kev koom tes tshwj xeeb ntawm alumina hmoov tau pom ntau dua thiab meej.
Hauv lub nceeg vaj ntawm ferrites, nws yog "grain ciam teb magician“
Taug kev mus rau hauv qhov chaw ua haujlwm loj ferrite ntau lawm, huab cua tau ntim nrog cov ntxhiab tsw tshwj xeeb ntawm kub-kub sintering. Qub Zhang, tus kws tshaj lij craftsman ntawm cov kab ntau lawm, feem ntau hais tias: "Thaum yav dhau los, ua manganese-zinc ferrite zoo li steaming buns. Yog tias cua sov me ntsis, yuav muaj 'siav' pores sab hauv, thiab qhov poob yuav tsis poob. " Niaj hnub no, ib txoj kab ntawm alumina hmoov yog qhia meej rau hauv cov mis, thiab qhov xwm txheej txawv heev.
Lub luag hauj lwm tseem ceeb ntawm alumina hmoov ntawm no tuaj yeem hu ua "txheej txheem kev lag luam": nws yog sib npaug sib npaug ntawm thaj tsam ntawm ferrite nplej. Xav txog tias suav tsis txheeb cov nplej me me tau zoo sib xws, thiab lawv cov kev sib txuas feem ntau yog cov kev sib txuas tsis muaj zog hauv cov khoom sib nqus thiab "qhov nyuaj tshaj plaws" ntawm cov hlau nplaum poob. High-purity, ultra-fine alumina hmoov (feem ntau submicron qib) yog embedded nyob rau hauv cov grain ciam teb. Lawv zoo li suav tsis txheeb cov "dams", uas ua rau muaj txiaj ntsig zoo rau kev loj hlob ntau ntawm cov nplej thaum lub sij hawm kub kub sintering, ua rau cov nplej me me thiab sib npaug sib npaug.
Hauv kev sib ntaus sib tua ntawm cov hlau nplaum nyuaj, nws yog "structural stabilizer“
Tig koj mloog mus rau lub ntiaj teb no ntawm high-performance neodymium hlau boron (NdFeB) mus tas li hlau nplaum. Cov khoom siv no, hu ua "tus huab tais ntawm cov hlau nplaum", muaj lub zog loj heev thiab yog lub zog tseem ceeb rau kev tsav tsheb hluav taws xob niaj hnub, cua turbines, thiab cov cuab yeej kho mob. Txawm li cas los xij, qhov kev sib tw loj loj nyob tom ntej: NdFeB yog qhov ua rau "demagnetization" ntawm qhov kub thiab txias, thiab nws sab hauv neodymium-nplua nuj theem kuj yog mos thiab tsis muaj kev ruaj ntseg.
Nyob rau lub sijhawm no, ib txoj kab ntawm alumina hmoov tshwm dua, ua lub luag haujlwm tseem ceeb ntawm "cov txheej txheem txhim kho". Thaum lub sij hawm sintering txheej txheem ntawm NdFeB, ultrafine alumina hmoov yog qhia. Nws tsis nkag mus rau theem tseem ceeb lattice nyob rau hauv ntau qhov ntau, tab sis yog xaiv tau muab faib rau ntawm cov ciam teb, tshwj xeeb tshaj yog cov theem tsis muaj zog neodymium-nplua nuj.
Nyob rau pem hauv ntej ntawm cov hlau nplaum sib xyaw, nws yog "tus neeg saib xyuas ntau yam"
Lub ntiaj teb ntawm cov khoom siv hlau nplaum tseem tab tom hloov zuj zus. Cov qauv hlau nplaum sib xyaw (xws li Halbach array) uas sib xyaw ua ke ntawm qhov sib nqus sib nqus induction siab thiab tsis tshua muaj cov yam ntxwv ntawm cov khoom sib nqus mos (xws li hlau hmoov cores) thiab lub zog quab yuam siab zoo ntawm cov khoom siv hlau nplaum ruaj khov yog nyiam mloog. Hauv hom kev tsim tshiab no, alumina hmoov tau pom ib theem tshiab.
Thaum nws yog ib qho tsim nyog los sib xyaw cov hmoov sib nqus ntawm cov khoom sib txawv (txawm tias tsis muaj cov hmoov sib nqus ua haujlwm) thiab tswj cov rwb thaiv tsev thiab cov khoom siv dag zog ntawm cov khoom kawg, alumina hmoov dhau los ua ib qho zoo tagnrho insulating txheej los yog sau nruab nrab nrog nws zoo heev rwb thaiv tsev, tshuaj inertness thiab zoo compatibility nrog ntau yam ntaub ntawv.
Lub teeb ntawm lub neej yav tom ntej: hloov maj mam thiab ntse dua
Daim ntawv thov ntawmalumina hmoovnyob rau hauv lub teb ntawmCov khoom siv hlau nplaumnyob deb dhau lawm. Nrog rau qhov kev tshawb fawb tob zuj zus, cov kws tshawb fawb tau cog lus los tshawb nrhiav cov kev tswj hwm kev hloov maj mam:
Nano-scale thiab meej doping: Siv nano-scale alumina hmoov nrog ntau qhov loj me thiab zoo dua dispersion, thiab txawm tshawb xyuas nws cov txheej txheem kev cai ntawm magnetic domain phab ntsa pinning ntawm atomic scale.
Alumina hmoov, qhov no oxide zoo tib yam los ntawm lub ntiaj teb, nyob rau hauv lub enlightenment ntawm tib neeg kev txawj ntse, ua tangible khawv koob nyob rau hauv lub invisible magnetic ntiaj teb no. Nws tsis tsim ib qho chaw sib nqus, tab sis ua rau txoj kev ruaj khov thiab muaj txiaj ntsig zoo ntawm cov hlau nplaum; nws tsis ncaj qha tsav lub cuab yeej, tab sis txhaj tshuaj muaj zog ntau dua rau hauv cov khoom siv hlau nplaum tseem ceeb ntawm lub tshuab tsav tsheb. Nyob rau hauv lub neej yav tom ntej ntawm kev nrhiav lub zog ntsuab, kev tsav hluav taws xob zoo thiab kev xav tau ntse, qhov tshwj xeeb thiab qhov tseem ceeb ntawm alumina hmoov hauv cov khoom sib nqus yuav txuas ntxiv muab kev txhawb zog thiab ntsiag to rau txoj kev loj hlob ntawm science thiab technology. Nws ua rau peb nco ntsoov tias nyob rau hauv lub suab paj nruag loj ntawm kev tshawb fawb thiab thev naus laus zis, cov ntawv sau yooj yim feem ntau muaj lub zog tob tshaj plaws - thaum kev tshawb fawb thiab kev ua haujlwm zoo sib xws, cov ntaub ntawv zoo tib yam yuav ci nrog lub teeb txawv txawv.