Yakasarudzika mupiro wealuminium poda mune magineti zvinhu
Paunenge uchibvisa yakakwira-kumhanya servo mota kana ine simba dhiraivha pamotokari nyowani ine simba, iwe uchaona kuti chaiyo magineti zvinhu zvinogara zviri pakati. Kana mainjiniya ari kukurukura nezvesimba rekumanikidza uye yakasara magineti simba remagineti, vanhu vashoma vanozoona kuti inoratidzika seyakajairika poda chena,alumina powder(Al₂O₃), ari kutamba chinyararire chinzvimbo che "gamba kuseri kwezviitiko". Iyo haina magineti, asi inogona kushandura kuita kwemagineti zvinhu; iyo isiri-conductive, asi ine simba guru pakushandura kwekushanda kwezvino. Mune indasitiri yemazuva ano inoteedzera iyo yekupedzisira magineti zvivakwa, iyo yakasarudzika mupiro wealumina poda iri kuonekwa zvakanyanya uye zvakajeka.
Muumambo hwe ferrites, i“zviyo muganhu n'anga“
Kufamba mumusangano mukuru wakapfava wekugadzira ferrite, mhepo inozadzwa nekunhuhwirira kwakakosha kwekupisa kwekupisa. Old Zhang, nyanzvi yemhizha pamutsetse wokugadzira, aiwanzoti: “Kare, kugadzira manganese-zinc ferrite kwakanga kwakafanana namabhanzi anopfungaira.Kudai kupisa kwacho kwakanga kwakaipa zvishoma, mukati maizova namaburi ‘akabikwa,’ uye kurasikirwa kwacho kwaisazodzika.” Nhasi, huwandu hwealumina hupfu hunounzwa mufomula, uye mamiriro acho akasiyana zvakanyanya.
Basa guru realuminium powder pano rinogona kunzi "grain boundary engineering": inogoverwa zvakaenzana pamiganhu pakati pezviyo zveferrite. Fungidzira kuti tsanga diki dzisingaverengeki dzakanyatsorongeka, uye makutano adzo kazhinji inzvimbo dzisina simba dzemagineti uye "nzvimbo dzakaomesesa" dzekurasikirwa nemagineti. Kuchena-kuchena, kwekupedzisira-kwakanaka alumina poda (kazhinji submicron level) yakamisikidzwa munzvimbo idzi dzemuganho wezviyo. Iwo akafanana neasingaverengeki madiki "madhamu", ayo anonyatso kuvharidzira kukura kwakanyanya kwezviyo panguva yekupisa kwekupisa, zvichiita kuti hukuru hwezviyo huve hudiki uye huve hwakapararira.
Munhandare yehondo yehard magnetism, i“structural stabilizer“
Tendedzera kutarisisa kwako kupasirese repamusoro-kuita neodymium iron boron (NdFeB) magineti echigarire. Ichi chinyorwa, chinozivikanwa se "king of magnets", chine simba rinoshamisa uye ndiro musimboti wesimba rekutyaira mota dzemazuva ano dzemagetsi, maturbine emhepo, uye chaiyo michina yekurapa. Nekudaro, dambudziko hombe riri pamberi: NdFeB inowanzoita "demagnetization" pakupisa kwakanyanya, uye chikamu chayo chemukati neodymium-rakapfuma chakapfava uye chinoshaya kugadzikana kwechimiro.
Panguva ino, nhamba yealumina powder inooneka zvakare, ichiita basa rinokosha re "structural enhancer". Munguva yekupisa kweNdFeB, ultrafine alumina poda inounzwa. Iyo haipindi iyo main phase lattice muhuwandu hukuru, asi inosarudza kugoverwa pamiganhu yezviyo, kunyanya idzo dzisina kusimba neodymium-rich chikamu nzvimbo.
Pamberi pemagineti akaumbwa, i "multi-faceted coordinator"
Nyika yemagineti zvinhu ichiri kushanduka. Iyo inosanganiswa magineti chimiro (seHalbach array) inosanganisa iyo yakakwira saturation magineti induction intensity uye yakaderera kurasikirwa maitiro eakapfava magineti zvinhu (senge iron poda cores) uye yakakwira yekumanikidza simba zvakanakira zvechigarire magineti iri kukwezva kutarisa. Mumhando iyi yekugadzira dhizaini, alumina poda yakawana nhanho nyowani.
Kana zvichidikanwa kusanganisa magineti poda ezvivakwa zvakasiyana (kunyangwe neasiri-magnetic anoshanda hupfu) uye kunyatso kudzora iyo yekuvharira uye mechanical simba rechikamu chekupedzisira, alumina poda inova yakanakira insulating coating kana kuzadza svikiro nekuvharira kwayo kwakanakisa, kusagadzikana kwemakemikari uye kuenderana kwakanaka nezvinhu zvakasiyana siyana.
Chiedza chenguva yemberi: yakanyanyisa uye yakangwara
Kushandiswa kwealumina powdermumunda wemagineti zvinhuiri kure nekupera. Nekudzika kwetsvagiridzo, masayendisiti akazvipira kuongorora zvakanyanya zvinyoro-nyoro chiyero chemutemo:
Nano-scale uye chaiyo doping: Shandisa nano-scale alumina poda ine yunifomu yakawanda saizi uye kupararira kuri nani, uye ongorora iyo chaiyo yekudzora maitiro eiyo magineti domain madziro pinning paatomu chiyero.
Alumina powder, iyi okisidi yakajairika kubva pasi, pasi pekuvhenekerwa kwehuchenjeri hwevanhu, inoita mashiripiti anobatika munyika isingaoneki yemagineti. Iyo haiburitse magineti, asi inovhura nzira yekugadzikana uye inobudirira yekufambisa kwemagineti; haityairi zvakananga mudziyo, asi inopinza simba rakawanda mukati mepakati remagineti emudziyo wekutyaira. Mune ramangwana rekutsvaga simba rakasvibirira, dhiraivha yemagetsi inoshanda uye maonero ane hungwaru, iyo yakasarudzika uye yakakosha mupiro wealumina poda mune magineti zvinhu zvicharamba zvichipa yakasimba uye yakanyarara rutsigiro rwekusimudzira sainzi uye tekinoroji. Zvinotiyeuchidza kuti mukubatana kukuru kwehunyanzvi hwesainzi uye tekinoroji, zvinyorwa zvakanyanya kazhinji zvine simba rakadzama - kana sainzi neumhizha zvinosangana, zvinhu zvakajairika zvinopenya nechiedza chinoshamisa.