Chopereka chapadera cha ufa wa alumina mu zinthu zamaginito
Mukachotsa mota ya servo yothamanga kwambiri kapena chipangizo champhamvu choyendetsera galimoto yatsopano yamagetsi, mudzapeza kuti zinthu zamaginito zolondola nthawi zonse zimakhala zofunika kwambiri. Mainjiniya akamakambirana za mphamvu yokakamiza ndi mphamvu yotsalira ya maginito ya maginito, anthu ochepa adzazindikira kuti ufa woyera wamba,ufa wa alumina(Al₂O₃), ikusewera mwakachetechete udindo wa "ngwazi kumbuyo kwa zochitika". Ilibe mphamvu ya maginito, koma imatha kusintha magwiridwe antchito a zinthu zamaginito; siiyendetsa magetsi, koma imakhudza kwambiri mphamvu yamagetsi yosinthira magetsi. Mumakampani amakono omwe amatsatira mphamvu zamaginito, gawo lapadera la ufa wa alumina likuonekera bwino kwambiri.
Mu ufumu wa ma ferrite, ndi "mfiti ya malire a tirigu“
Mutalowa mu malo akuluakulu opangira ferrite yofewa, mpweya umadzaza ndi fungo lapadera la kutentha kwambiri. Old Zhang, katswiri waluso pa mzere wopanga, nthawi zambiri ankati: “Kale, kupanga manganese-zinc ferrite kunali ngati kuwotcha buns. Ngati kutentha kunali koipa pang'ono, pakanakhala mabowo 'ophikidwa' mkati, ndipo kutayika sikukanatsika.” Masiku ano, ufa wa alumina wochepa umalowetsedwa molondola mu fomula, ndipo zinthu n'zosiyana kwambiri.
Ntchito yaikulu ya ufa wa alumina pano ingatchedwe kuti "uinjiniya wa malire a tirigu": umagawidwa mofanana pamalire pakati pa tirigu wa ferrite. Tangoganizani kuti tirigu tating'ono tosawerengeka takonzedwa bwino, ndipo malo olumikizirana awo nthawi zambiri amakhala maulalo ofooka mu mphamvu zamaginito ndi "malo ovuta kwambiri" a kutayika kwa maginito. Ufa wa alumina woyera kwambiri, wosalala kwambiri (nthawi zambiri mulingo wa submicron) umayikidwa m'malo awa amalire a tirigu. Ali ngati "madamu" tating'ono tosawerengeka, omwe amaletsa bwino kukula kwa tirigu panthawi ya kutentha kwambiri, zomwe zimapangitsa kukula kwa tirigu kukhala kochepa komanso kogawidwa mofanana.
Mu nkhondo ya mphamvu ya maginito, ndi "chokhazikitsa kapangidwe ka nyumba“
Yang'anani kwambiri dziko la maginito okhazikika a neodymium iron boron (NdFeB) opambana kwambiri. Zipangizozi, zomwe zimadziwika kuti "mfumu ya maginito", zili ndi mphamvu zambiri ndipo ndiye gwero lalikulu la mphamvu zoyendetsera magalimoto amagetsi amakono, ma turbine amphepo, ndi zida zamankhwala zolondola. Komabe, vuto lalikulu likubwera: NdFeB imakonda "kuchotsa maginito" kutentha kwambiri, ndipo gawo lake lamkati lolemera ndi neodymium ndi lofewa komanso lopanda kukhazikika kwa kapangidwe kake.
Panthawiyi, ufa wa alumina wochepa umawonekeranso, womwe umagwira ntchito yofunika kwambiri ngati "chowonjezera kapangidwe kake". Panthawi yochotsa NdFeB, ufa wa alumina wochuluka kwambiri umalowetsedwa. Sulowa mu lattice yayikulu kwambiri, koma umagawidwa mosankha m'malire a tirigu, makamaka madera ofooka a neodymium okhala ndi magawo ambiri.
Patsogolo pa maginito ophatikizana, ndi "wogwirizanitsa mbali zambiri"
Dziko la zinthu zamaginito likusinthabe. Kapangidwe ka maginito kophatikizana (monga Halbach array) komwe kumaphatikiza mphamvu yayikulu ya maginito yolowetsedwa ndi kutayika kochepa kwa zinthu zofewa zamaginito (monga chitsulo cha ufa wachitsulo) ndi ubwino wapamwamba wa mphamvu ya maginito yokhazikika ukukopa chidwi. Mu mtundu uwu wa kapangidwe katsopano, ufa wa alumina wapeza gawo latsopano.
Pakufunika kuphatikiza ufa wa maginito wamitundu yosiyanasiyana (ngakhale ndi ufa wosagwira ntchito wa maginito) ndikuwongolera bwino kutchinjiriza ndi mphamvu ya makina a gawo lomaliza, ufa wa alumina umakhala chophimba chabwino kwambiri chotetezera kutentha kapena chodzaza ndi kutchinjiriza kwake kwabwino, kusakhala ndi mankhwala komanso kugwirizana bwino ndi zinthu zosiyanasiyana.
Kuwala kwa mtsogolo: kochenjera komanso kwanzeru
Kugwiritsa ntchitoufa wa aluminam'munda wazipangizo zamaginitoKufufuza kwakukulu kukupitirirabe. Chifukwa cha kuzama kwa kafukufuku, asayansi adzipereka kufufuza malamulo osavuta:
Kugwiritsa ntchito ufa wa alumina wofanana ndi nano-scale komanso molondola: Gwiritsani ntchito ufa wa alumina wofanana ndi nano-scale wokhala ndi kukula kofanana komanso kufalikira bwino, komanso fufuzani momwe umagwirira ntchito molondola pokonza maginito a khoma la maginito pa sikelo ya atomiki.
Ufa wa alumina, okosidi wamba wochokera padziko lapansi, motsogozedwa ndi nzeru za anthu, umachita zamatsenga zooneka m'dziko losaoneka la maginito. Siupanga mphamvu ya maginito, koma umatsegula njira yotumizira mphamvu ya maginito yokhazikika komanso yothandiza; suyendetsa mwachindunji chipangizocho, koma umalowetsa mphamvu yamphamvu kwambiri muzinthu zazikulu zamaginito za chipangizo choyendetsera. M'tsogolomu pofunafuna mphamvu zobiriwira, kuyendetsa bwino magetsi komanso kuzindikira kwanzeru, chopereka chapadera komanso chofunikira kwambiri cha ufa wa alumina muzinthu zamaginito chidzapitiriza kupereka chithandizo cholimba komanso chopanda phokoso pakukula kwa sayansi ndi ukadaulo. Chimatikumbutsa kuti mu nyimbo yayikulu ya zatsopano za sayansi ndi ukadaulo, zolemba zoyambira nthawi zambiri zimakhala ndi mphamvu yayikulu kwambiri - sayansi ndi luso likakumana, zipangizo wamba zimawalanso ndi kuwala kodabwitsa.