Kupereka kwapadera kwa alumina ufa muzinthu zamaginito
Mukamasula servo motor yothamanga kwambiri kapena choyendetsa champhamvu pagalimoto yatsopano yamagetsi, mupeza kuti zida zamaginito zolondola nthawi zonse zimakhala pachimake. Akatswiri akamakambirana za mphamvu yokakamiza komanso mphamvu yotsalira ya maginito, anthu ochepa angazindikire kuti ufa wowoneka ngati wamba,aluminiyamu ufa(Al₂O₃), akusewera mwakachetechete ngati "ngwazi kumbuyo kwazithunzi". Zilibe maginito, koma zimatha kusintha machitidwe a maginito; si conductive, koma zimakhudza kwambiri kusinthika kwamakono. M'makampani amakono omwe amatsata maginito apamwamba kwambiri, chopereka chapadera cha alumina ufa chikuwonekera momveka bwino.
Mu ufumu wa ferrites, ndi "wamatsenga malire a tirigu“
Kuyenda mu msonkhano waukulu wofewa wofewa wa ferrite, mpweya umadzazidwa ndi fungo lapadera la kutentha kwapamwamba kwambiri. Old Zhang, mmisiri waluso pakupanga makinawo, nthaŵi zambiri ankati: “Kale, kupanga ferrite ya manganese-zinki kunali ngati nsonga za nthunzi.” Kutentha kukanakhala koipitsitsa pang’ono, mkati mwake munakhala tibowo ‘zophikidwa,’ ndipo kutayika kwake sikutsika.” Masiku ano, kuchuluka kwa ufa wa aluminiya kumalowetsedwa bwino mu chilinganizo, ndipo zinthu ndizosiyana kwambiri.
Ntchito yaikulu ya alumina ufa pano ikhoza kutchedwa "umisiri wa malire a tirigu": imagawidwa mofanana pamalire pakati pa mbewu za ferrite. Tangoganizani kuti timbewu tating'ono ting'onoting'ono tambirimbiri takhazikika bwino, ndipo m'mphambano zake nthawi zambiri pamakhala malo opanda mphamvu a maginito komanso "malo ovuta kwambiri" kutayika kwa maginito. Kuyera kwambiri, kopitilira muyeso-bwino kwambiri wa alumina ufa (nthawi zambiri mulingo wa submicron) umayikidwa m'malire a mbewu awa. Iwo ali ngati "madamu" ang'onoang'ono osawerengeka, omwe amalepheretsa kukula kwakukulu kwa mbewu panthawi yotentha kwambiri, zomwe zimapangitsa kuti tirigu akhale wochepa komanso wogawidwa mofanana.
Pankhondo yamphamvu maginito, ndi "structural stabilizer“
Yang'anirani chidwi chanu kudziko la maginito okhazikika a neodymium iron boron (NdFeB). Zinthuzi, zomwe zimadziwika kuti "king of magnets", zili ndi mphamvu zochulukirapo ndipo ndizomwe zimayendetsa magalimoto amakono amagetsi, makina opangira mphepo, ndi zida zachipatala zolondola. Komabe, vuto lalikulu lili m'tsogolo: NdFeB sachedwa "demagnetization" pa kutentha, ndi mkati neodymium wolemera gawo ndi ndi ofewa ndipo alibe structural bata.
Panthawiyi, kuchuluka kwa alumina ufa kumawonekeranso, ndikusewera gawo lalikulu la "structural enhancer". Panthawi ya sintering ya NdFeB, ufa wa ultrafine alumina umayambitsidwa. Sichimalowa m'magawo akuluakulu amtundu wambiri, koma amagawidwa m'malire a tirigu, makamaka madera omwe ali ofooka kwambiri a neodymium.
Kutsogolo kwa maginito ophatikizika, ndi "wogwirizanitsa mbali zambiri"
Dziko la maginito zipangizo akadali kusintha. Kapangidwe ka maginito kaphatikizidwe (monga Halbach array) komwe kumaphatikizira kuchulukira kwamphamvu kwa maginito ndi kutayika kochepa kwa zida zofewa za maginito (monga chitsulo cha ufa wachitsulo) ndi mphamvu zokakamiza zamphamvu zamaginito okhazikika zimakopa chidwi. Mu mtundu uwu wa mapangidwe atsopano, ufa wa alumina wapeza siteji yatsopano.
Pakafunika kuphatikizira maginito ufa wamitundu yosiyanasiyana (ngakhale osagwiritsa ntchito maginito ufa) ndikuwongolera bwino kutsekemera ndi mphamvu zamakina za gawo lomaliza, ufa wa aluminiyamu umakhala wokutira wabwino kwambiri kapena kudzaza sing'anga ndi kutchinjiriza kwake kwakukulu, kusakhazikika kwamankhwala komanso kuyanjana kwabwino ndi zida zosiyanasiyana.
Kuwala kwamtsogolo: mochenjera komanso mwanzeru
Kugwiritsa ntchito kwaaluminiyamu ufam'munda wamaginito zipangizoili kutali. Ndi kuzama kwa kafukufuku, asayansi akudzipereka kuti afufuze malamulo obisika kwambiri:
Nano-scale komanso doping yolondola: Gwiritsani ntchito nano-scale alumina ufa wokhala ndi kukula kofananira komanso kubalalitsidwa bwino, komanso fufuzani njira yake yoyendetsera khoma la maginito pamlingo wa atomiki.
Alumina ufa, okusayidi wamba uwu wochokera padziko lapansi, mowunikiridwa ndi nzeru zaumunthu, amachita matsenga owoneka mu dziko losaoneka la maginito. Sichimapanga mphamvu ya maginito, koma imatsegula njira yoyendetsera bwino komanso yogwira ntchito ya maginito; sichimayendetsa chipangizocho mwachindunji, koma imalowetsa mphamvu yamphamvu kwambiri pamagetsi apakati pa chipangizo choyendetsa. M'tsogolomu kutsata mphamvu zobiriwira, kuyendetsa bwino kwa magetsi ndi kuzindikira kwanzeru, chopereka chapadera komanso chofunikira kwambiri cha alumina ufa muzinthu zamaginito chidzapitiriza kupereka chithandizo cholimba komanso chachete pa chitukuko cha sayansi ndi zamakono. Zimatikumbutsa kuti mu symphony yaikulu ya sayansi ndi zamakono zamakono, zolemba zoyamba nthawi zambiri zimakhala ndi mphamvu zakuya - pamene sayansi ndi luso zimakumana, zipangizo wamba zidzawalanso ndi kuwala kodabwitsa.