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Sayina okanye Yenza iAkhawunti
Aumazibuthe neodymium(kwaziwa njengeNdFeB,I-NIBokanyeNeoumazibuthe) lolona hlobo lusetyenziswa kakhuluumazibuthe onqabileyo womhlaba.Yiumazibuthe osisigxinayenziwe ngeingxubevangeyeneodymium,intsimbi, kwayeibhoronukwenza iNd2Fe14Bi-tetragonalisakhiwo sekristale.Iphuhliswe ngokuzimeleyo ngo-1984 nguGeneral MotorskwayeSumitomo Izinyithi ezikhethekileyo, iimagnethi zeneodymium lolona hlobo lunamandla lwemagnethi esisigxina efumanekayo kurhwebo.Iimagnethi ze-NdFeB zinokuhlelwa njenge-sintered okanye idityaniswe, kuxhomekeke kwinkqubo yokuvelisa esetyenziswayo.Bathathe indawo yezinye iintlobo zemagnethi kwizicelo ezininzi kwiimveliso zanamhlanje ezifuna imagnethi eyomeleleyo esisigxina, njengeiinjini zombanengezixhobo ezingenazintambo,hard disk driveskunye nezibophelelo zemagneti.
Iipropati
Amabanga
Iimagnethi ze-Neodymium zihlelwa ngokwazoimveliso yamandla aphezulu, enxulumene neimagnethiimveliso ngokweyunithi umthamo.Amaxabiso aphezulu abonisa iimagnethi ezinamandla.Kwimagnethi ye-NdFeB ene-sintered, kukho ulwahlulo olwamkelwa ngokubanzi lwamazwe ngamazwe.Amaxabiso abo aqala ku-N28 ukuya ku-N55.Unobumba wokuqala ongu-N phambi kokuba amaxabiso abe mfutshane kwi-neodymium, ethetha imagnethi ye-NdFeB ene-sintered.Iileta ezilandela amaxabiso zibonisa unyanzeliso lwangaphakathi kunye namaqondo obushushu aphezulu okusebenza (anxulunyaniswa kakuhleUbushushu beCurie), ukusuka kwindalo emiselweyo (ukuya kwi-80 °C okanye i-176 °F) ukuya kwi-TH (230 °C okanye 446 °F).
Amabanga emagnethi ye-NdFeB ene-sintered:
- N30 – N55
- N30M – N50M
- N30H – N50H
- N30SH – N48SH
- N30UH – N42UH
- N28EH – N40EH
- N28TH – N35TH
Iimpawu zemagneti
Ezinye iimpawu ezibalulekileyo ezisetyenziselwa ukuthelekisa iimagnethi ezisisigxina zezi:
- Remanence(Br), elinganisa ukomelela kwemagnethi.
- Ukunyanzeliswa(Hci), ukuxhathisa kwemathiriyeli ekubeni yi-demagnetized.
- Ubuninzi bemveliso yamandla(BHmax), Ubuninzi bamandla kazibuthe, obonakaliswe ngexabiso eliphezuluukuxinana kwemagnethi(B) amaxeshaamandla emagnethi(H).
- Ubushushu beCurie(TC), iqondo lobushushu apho impahla ilahlekelwa yimagnethi yayo.
Iimagnethi zeNeodymium zineremanence ephezulu, ukunyanzeliswa okuphezulu kakhulu kunye nemveliso yamandla, kodwa zihlala zisezantsi ubushushu beCurie kunezinye iintlobo zemagnethi.Special neodymium umazibuthe alloys ezibandakanyaterbiumkwayeidysprosiumziye zaphuhliswa ezinobushushu obuphezulu beCurie, ezivumela ukuba zinyamezele amaqondo aphezulu. Itheyibhile engezantsi ithelekisa ukusebenza kwemagnethi yemagnethi ye-neodymium kunye nezinye iintlobo zeemagnethi ezisisigxina.
Iimpawu zomzimba kunye noomatshini
| Ipropati | Neodymium | Sm-Co |
|---|---|---|
| Remanence(T) | 1–1.5 | 0.8–1.16 |
| Ukunyanzeliswa(MA/m) | 0.875–2.79 | 0.493–2.79 |
| Recoil permeability | 1.05 | 1.05–1.1 |
| Iqondo lomlinganiso weremanence (%/K) | -(0.12–0.09) | -(0.05–0.03) |
| Iqondo lomlinganiso lonyanzeliso (%/K) | -(0.65–0.40) | -(0.30–0.15) |
| Ubushushu beCurie(°C) | 310–370 | 700–850 |
| Ubuninzi (g/cm3) | 7.3–7.7 | 8.2–8.5 |
| I-coefficient yokwandisa i-Thermal, ingqamene nemagnetization (1/K) | (3–4)×10−6 | (5–9)×10−6 |
| I-coefficient yokwandisa i-Thermal, perpendicular to magnetization (1/K) | (1–3)×10−6 | (10–13)×10−6 |
| Amandla e-Flexural(N/mm2) | 200–400 | 150–180 |
| Amandla acinezelayo(N/mm2) | 1000-1100 | 800-1000 |
| Tensile strength(N/mm2) | 80–90 | 35–40 |
| Vickers ubulukhuni(HV) | 500–650 | 400–650 |
| Umbaneukumelana(Ω·cm) | (110–170)×10−6 | (50–90)×10−6 |
Ixesha lokuposa: Jun-05-2023