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Amagnet neodymium(sidoo kale loo yaqaanNdFeB,NIBamaNeomagnet) waa nooca ugu isticmaalka badanmagnet-dhul dhif ah.Waa amagnet joogto ahlaga sameeyay andaawahaeeneodymium,birtaiyoboronin la sameeyo Nd2Fe14Btetragonalqaab-dhismeedka crystalline.Waxaa si madax banaan u horumariyay 1984kiiGeneral MotorsiyoSumitomo Special Metals, Neodymium magnets waa nooca ugu xoogan ee magnet joogto ah oo laga heli karo ganacsi ahaan.Magnet-ka NdFeB waxa loo kala saari karaa sida sinteed ama isku xidhan, iyadoo ku xidhan habka wax soo saarka ee la isticmaalo.Waxay ku beddeleen noocyo kale oo birlab ah codsiyo badan oo ku saabsan alaabada casriga ah ee u baahan magnets joogto ah oo xooggan, sidamatoorada korontadaqalab aan xadhig lahayn,Hard disk-yadaiyo xidhayaasha magnetic.
Guryaha
Darajooyinka
Neodymium magnets waxaa lagu qiimeeyaa si waafaqsan koodawax soo saarka tamarta ugu badan, kaas oo la xidhiidhaqulqulka magneticwax soo saarka halkii mugga halbeegga.Qiimaha sare ayaa tilmaamaya magnets xooggan.Magnets-ka NdFeB-da la isku xidhay, waxa jira kala-soocid caalami ah oo si weyn loo aqoonsan yahay.Qiimahooda ayaa u dhexeeya N28 ilaa N55.Xarafka ugu horreeya N ee ka horreeya qiyamka ayaa u gaaban neodymium, taasoo la macno ah magnets NdFeB oo la isku duubay.Xarfaha raacaya qiyamka waxay muujinayaan qasabka gudaha ah iyo heerkulka shaqada ugu badan (oo si togan ula xidhiidhaHeerkulka Curie), kaas oo u dhexeeya heerka caadiga ah (ilaa 80 °C ama 176 °F) ilaa TH (230 °C ama 446 °F).
Darajooyinka magnets-ka NdFeB ee la isku daray:
- N30 - N55
- N30M - N50M
- N30H - N50H
- N30SH - N48SH
- N30UH - N42UH
- N28EH - N40EH
- N28TH - N35TH
Guryaha magnetic
Qaar ka mid ah guryaha muhiimka ah ee loo isticmaalo isbarbardhigga magnet-ka joogtada ah waa:
- Joogista(Br), kaas oo cabbiraya xoogga goobta magnetic.
- Qasab(Hci), walxaha iska caabbinta si ay u noqdaan kuwo daciifay.
- Alaabta tamarta ugu badan(BHmax), cufnaanta tamarta magnetic, lagu gartaa qiimaha ugu badan eecufnaanta qulqulka magnetic(B) waqtiyoxoogga magnetic(H).
- Heerkulka Curie(TC), heerkulka maaddadu ay lumiso birlabkeeda.
Neodymium magnets waxay leeyihiin dib-u-soo-noolayn sare, xoog-saarid aad u sarreeya iyo wax soo saarka tamarta, laakiin inta badan heerkulka Curie ayaa ka hooseeya noocyada kale ee magnets.Alloys magnet neodymium gaar ah oo ay ku jiraanterbiumiyodysprosiumayaa la sameeyay kuwaas oo leh heerkul sare oo Curie ah, taas oo u oggolaanaysa inay u dulqaataan heerkulka sare. Jadwalka hoose wuxuu isbarbar dhigayaa waxqabadka magnetic magnets neodymium iyo noocyada kale ee magnets joogtada ah.
Qalabka jirka iyo farsamada
| Hanti | Neodymium | Sm-Co |
|---|---|---|
| Joogista(T) | 1–1.5 | 0.8–1.16 |
| Qasab(MA/m) | 0.875–2.79 | 0.493–2.79 |
| Soo noqoshada soo noqoshada | 1.05 | 1.05–1.1 |
| Heerkulka joogitaanka (%/K) | − (0.12–0.09) | (0.05-0.03) |
| Isku-dhafka heerkulka isku-xidhka (%/K) | (0.65-0.40) | (0.30-0.15) |
| Heerkulka Curie(°C) | 310-370 | 700-850 |
| Cufnaanta (g/cm3) | 7.3–7.7 | 8.2–8.5 |
| Isku xidhka balaadhinta kulaylka, barbar socda magnetization (1/K) | (3–4)×10-6 | (5–9)×10-6 |
| Isku xidhka balaadhinta kulaylka, siman magnetization (1/K) | (1–3)×10-6 | (10-13)×10-6 |
| Xoog dabacsanaan(N/mm2) | 200-400 | 150-180 |
| Xoog cadaadis leh(N/mm2) | 1000-1100 | 800-1000 |
| Xoog xajin(N/mm2) | 80-90 | 35-40 |
| adkaanta Vickers(HV) | 500-650 | 400-650 |
| Korontoiska caabin(Ω·cm) | (110-170)×10-6 | (50-90)×10-6 |
Waqtiga boostada: Jun-05-2023