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Lowani Kapena Pangani Akaunti
Aneodymium maginito(wotchedwansoNdi FeB,NIBkapenaNeomaginito) ndi mtundu womwe umagwiritsidwa ntchito kwambirimaginito osowa padziko lapansi.Ndi amaginito okhazikikazopangidwa kuchokera kualoyizaneodymium,chitsulo,ndiboronikupanga Nd2Fe14Btetragonalcrystalline kapangidwe.Kupangidwa paokha mu 1984 ndiGeneral MotorsndiSumitomo Special Metals, maginito a neodymium ndi amphamvu kwambiri maginito okhazikika omwe amapezeka pamalonda.Maginito a NdFeB akhoza kugawidwa ngati sintered kapena omangika, kutengera njira yopangira yomwe imagwiritsidwa ntchito.Asinthanso mitundu ina ya maginito pamagwiritsidwe ambiri pazinthu zamakono zomwe zimafunikira maginito amphamvu okhazikika, mongamagalimoto amagetsimu zida zopanda zingwe,hard disk drivendi maginito fasteners.
Katundu
Maphunziro
Maginito a Neodymium amapangidwa molingana ndi awopazipita mphamvu mankhwala, zomwe zimagwirizana ndimphamvu ya maginitozotuluka pa voliyumu ya unit.Makhalidwe apamwamba amasonyeza maginito amphamvu.Kwa maginito a sintered NdFeB, pali gulu lodziwika bwino padziko lonse lapansi.Makhalidwe awo amachokera ku N28 mpaka N55.Chilembo choyamba N pamaso pazikhalidwe ndi chachidule cha neodymium, kutanthauza maginito a sintered NdFeB.Malembo omwe amatsatira zikhalidwezi amawonetsa kukakamiza kwamkati ndi kutentha kwakukulu kwa magwiridwe antchito (ogwirizana bwino ndiCurie kutentha), zomwe zimachokera ku zosasintha (mpaka 80 °C kapena 176 °F) mpaka TH (230 °C kapena 446 °F).
Magiredi a sintered NdFeB maginito:
- N30 – N55
- N30M – N50M
- N30H – N50H
- N30SH – N48SH
- N30UH – N42UH
- N28EH – N40EH
- N28TH - N35TH
Maginito katundu
Zina zofunika zomwe zimagwiritsidwa ntchito poyerekeza maginito okhazikika ndi:
- Remanence(Br), yomwe imayesa mphamvu ya maginito.
- Kukakamiza(Hci), kukana kwa zinthuzo kuti zisawonongeke.
- Zolemba malire mphamvu mankhwala(BHmax), kachulukidwe ka mphamvu ya maginito, yodziwika ndi mtengo wapamwamba wamphamvu ya maginito(B) nthawimphamvu ya maginito(H).
- Curie kutentha(TC), kutentha kumene zinthu zimataya mphamvu yake ya maginito.
Maginito a Neodymium ali ndi remanence yapamwamba, yokakamiza kwambiri komanso mphamvu zamagetsi, koma nthawi zambiri amachepetsa kutentha kwa Curie kuposa mitundu ina ya maginito.Ma aloyi apadera a neodymium maginito omwe akuphatikizapoterbiumndidysprosiumapangidwa omwe ali ndi kutentha kwakukulu kwa Curie, kuwalola kupirira kutentha kwakukulu. Gome ili m'munsili likufanizira magwiridwe antchito a maginito a neodymium ndi mitundu ina ya maginito okhazikika.
Thupi ndi makina katundu
| Katundu | Neodymium | Sm-Co |
|---|---|---|
| Remanence(T) | 1–1.5 | 0.8–1.16 |
| Kukakamiza(MA/m) | 0.875–2.79 | 0.493–2.79 |
| Recoil permeability | 1.05 | 1.05–1.1 |
| Kutentha kwapakati kwa remanence (%/K) | −(0.12–0.09) | −(0.05–0.03) |
| Kutentha kwapakati kwa coercivity (%/K) | −(0.65–0.40) | −(0.30–0.15) |
| Curie kutentha(°C) | 310-370 | 700-850 |
| Kachulukidwe (g/cm3) | 7.3–7.7 | 8.2–8.5 |
| Kuwonjezela kwamafuta kokwana, kufanana ndi magnetization (1/K) | (3–4)×10−6 | (5–9)×10−6 |
| Kuwonjezela kwamafuta kokwana, perpendicular to magnetization (1/K) | (1–3)×10−6 | (10–13)×10−6 |
| Flexural mphamvu(N/mm2) | 200-400 | 150-180 |
| Compressive mphamvu(N/mm2) | 1000-1100 | 800-1000 |
| Kulimba kwamakokedwe(N/mm2) | 80-90 | 35–40 |
| Vickers kuuma(HV) | 500-650 | 400-650 |
| Zamagetsiresistivity(Ω·cm) | (110–170)×10−6 | (50–90)×10−6 |
Nthawi yotumiza: Jun-05-2023