Zvakawanda sei zvaunoziva nezveNdFeB magineti?

Permanent magineti zvinhu kunyanya zvinosanganisira AlNiCo (AlNiCo) system simbi chigarire magineti, chizvarwa chekutanga SmCo5 zvachose magineti (inonzi 1: 5 samarium cobalt alloy), chizvarwa chechipiri Sm2Co17 (inonzi 2:17 samarium cobalt alloy) zvachose magineti, chizvarwa chechitatu chisingawanzo. pasi chisingaperi magineti alloy NdFeB (inonzi NdFeB chiwanikwa). Nekuvandudzwa kwesainzi uye tekinoroji, kuita kweNdFeB zvachose magineti zvinhu kwakagadziridzwa uye munda wekushandisa wakawedzerwa. Iyo sintered NdFeB ine yakakwira magineti simba chigadzirwa (50 MGA ≈ 400kJ/m3), yakakwira coercivity (28EH, 32EH) uye yakanyanya tembiricha yekushandisa (240C) yakagadzirwa mumaindasitiri. Iyo mikuru yezvigadzirwa zveNdFeB magineti echigarire haawanzo pasi simbi Nd (Nd) 32%, simbi element Fe (Fe) 64% uye isiri-simbi chinhu B (B) 1% (chishoma che dysprosium (Dy), terbium ( Tb), cobalt (Co), niobium (Nb), gallium (Ga), aruminiyamu (Al), mhangura (Cu) nezvimwe zvinhu). NdFeB ternary system inogara magineti zvinhu yakavakirwa paNd2Fe14B komputa, uye kuumbwa kwayo kunofanirwa kufanana nekomboni Nd2Fe14B molecular formula. Nekudaro, iyo magineti zvimiro zvemagineti zvakanyanya kuderera kana kunyange isiri-magnetic kana reshiyo yeNd2Fe14B yakagovaniswa zvachose. Chete kana zviri mukati neodymium uye boron mune chaiyo magineti yakawanda kupfuura zviri neodymium uye boron muNd2Fe14B komboni, inogona kuwana zviri nani zvechigarire magineti pfuma.

Sintering: Ingredients (formula) → kunyunguduka → kugadzira hupfu → kudzvanya (kuumba kutarisisa) → sintering uye kuchembera → magineti kuongorora pfuma → kugadzirwa kwemuchina → kurapwa kwepamusoro (electroplating) → kuongorora chigadzirwa
Bonding: raw material → particle size kugadzirisa → kusanganiswa nebinder → kuumba (kutsikirira, extrusion, jekiseni) → kurapwa kwepfuti (kutsikirira) → kugadziridzazve → kuongorora chigadzirwa chapera

Kune matatu makuru ma parameters: remanence Br (Residual Induction), unit Gauss, mushure mekunge magnetic field yabviswa kubva kune saturation state, yakasara magnetic flux density, inomiririra kunze kwemagineti simba remagineti; Kumanikidza simba Hc (Kumanikidza Simba), unit Oersteds, kuisa magineti mune reverse yakashandiswa magineti, kana iyo inoshandiswa magineti inowedzera kune rimwe simba, iyo magineti flux density yemagineti ichave yakakwirira. Kana iyo magineti yakashandiswa ichiwedzera kune rimwe simba, iyo magineti yemagineti ichanyangarika, kugona kurwisa iyo inoshandiswa magineti inonzi Coercive Force, iyo inomiririra chiyero che demagnetization kuramba; Magnetic simba chigadzirwa BHmax, unit Gauss-Oersteds, isimba remagineti rinogadzirwa pachiyero cheyuniti yezvinhu, inova huwandu hwemuviri hwehuwandu hwesimba rinogona kuchengetwa nemagineti.

Parizvino, nzvimbo huru dzekushandisa ndeidzi: chisingaperi magineti mota, jenareta, MRI, magineti separator, odhiyo mutauri, magineti levitation system, magineti kutapurirana, magineti kusimudza, chiridzwa, fluid magnetization, magineti therapy michina, nezvimwe. Yave chinhu chakakosha. yekugadzira mota, general muchina, petrochemical indasitiri, zvemagetsi ruzivo indasitiri uye yekucheka-kumucheto tekinoroji.

NdFeB ndiyo yakasimba kwazvo inogara magineti zvinhu munyika, chigadzirwa chayo chesimba remagineti chakakwira zvakapetwa kagumi pane ferrite inoshandiswa zvakanyanya, uye yakapetwa kaviri sezera rekutanga nerechipiri remagineti epasi asingawanzo (SmCo zvachose magineti), inozivikanwa se. iyo "mambo wemagineti asingagumi". Nekutsiva zvimwe zvisingaperi zvemagineti, huwandu uye huremu hwechishandiso hunogona kudzikiswa zvakanyanya. Nekuda kwezviwanikwa zvakawanda zveneodymium, zvichienzaniswa nesamarium-cobalt magineti echigarire, iyo inodhura cobalt inotsiviwa nesimbi, izvo zvinoita kuti chigadzirwa chiwedzere kudhura.