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Banye ma ọ bụ Mepụta Akaụntụ
Aneodymium magnet(a makwaara dị kaNdFeB,NIBma ọ bụNeomagnet) bụ ụdị nke a na-ejikarị eme iheobere-ụwa magnet.Ọ bụ amagnet na-adịgide adịgidemere site na aalloynkeneodymium,ígwè, naboronime Nd2Fe14BtetragonalỌdịdị kristal.Mepụtara onwe ya na 1984 site naGeneral MotorsnaỌla Ọpụrụiche Sumitomo, Neodymium magnetik bụ ụdị magnet siri ike na-adịgide adịgide dị na ahịa.Enwere ike ịkewa ihe ndọta NdFeB dị ka sintered ma ọ bụ jikọtara ya, dabere na usoro nrụpụta ejiri.Ha edochiela ụdị ndọta ndị ọzọ n'ọtụtụ ngwa na ngwaahịa ọgbara ọhụrụ nke chọrọ ndọta na-adịgide adịgide siri ike, dị kaigwe eletrikin'ime akụrụngwa enweghị eriri,diski ike draịvana magnetik fasteners.
Njirimara
akara ule
Neodymium magnets na-enweta akara dị ka ha si dịkacha ike ngwaahịa, nke metụtara namagnetik fluxmmepụta kwa otu olu.Ọnụ ahịa dị elu na-egosi ndọta siri ike.Maka ndọta NdFeB siri ike, enwere nhazi ọkwa mba ụwa niile ama ama.Ọnụ ahịa ha sitere na N28 ruo N55.Akwụkwọ ozi mbụ N tupu ụkpụrụ dị mkpụmkpụ maka neodymium, nke pụtara magnetik NdFeB.Akwụkwọ ozi ndị na-eso ụkpụrụ ndị a na-egosi mmanye dị n'ime na oke okpomọkụ na-arụ ọrụ (njikọ nke ọma naCurie okpomọkụ), nke sitere na ndabara (ruo 80 Celsius ma ọ bụ 176 Celsius) ruo TH (230 Celsius C ma ọ bụ 446 Celsius F).
Ọkwa nke magnetik NdFeB emechiri emechi:
- N30 - N55
- N30M - N50M
- N30H - N50H
- N30SH - N48SH
- N30UH - N42UH
- N28EH - N40EH
- N28TH - N35TH
Njirimara magnetik
Ụfọdụ ihe dị mkpa eji atụnyere ndọta na-adịgide adịgide bụ:
- Ịnọgide(Br), nke na-atụ ike nke oghere magnetik.
- Mmanye(Hci), ihe na-eguzogide ka ọ bụrụ demagnetized.
- Ngwaahịa ike kacha(BHmax), njupụta nke ike magnetik, ji oke uru nkenjupụta ndọta(B) ogeike ndọta(H).
- Curie okpomọkụ(TC), okpomọkụ nke ihe onwunwe na-efunahụ magnetism ya.
Ihe ndọta Neodymium nwere remanence dị elu, oke mmanye na ngwaahịa ike dị elu, mana ọ na-adịkarị ala Curie okpomọkụ karịa ụdị ndọta ndị ọzọ.Ọpụrụiche neodymium magnet alloys nke gụnyereterbiumnadysprosiumemepụtarala nke nwere oke okpomọkụ Curie, na-enye ha ohere ịnabata okpomọkụ dị elu. Tebụlụ dị n'okpuru na-atụnyere arụmọrụ magnetik nke neodymium magnet na ụdị ndọta ndị ọzọ na-adịgide adịgide.
Njirimara anụ ahụ na igwe
| Ngwongwo | Neodymium | Sm-Co |
|---|---|---|
| Ịnọgide(T) | 1–1.5 | 0.8–1.16 |
| Mmanye(MA/m) | 0,875–2.79 | 0,493–2.79 |
| Nkwụghachi ike | 1.05 | 1.05–1.1 |
| Ọnụọgụ okpomọkụ nke remanence (%/K) | - (0.12–0.09) | - (0.05–0.03) |
| Ọnụọgụ okpomọkụ nke mmanye (%/K) | - (0.65–0.40) | - (0.30–0.15) |
| Curie okpomọkụ(°C) | 310–370 | 700–850 |
| Njupụta (g/cm3) | 7.3–7.7 | 8.2–8.5 |
| Ọnụọgụ mgbasawanye okpomọkụ, yiri magnetization (1/K) | (3–4)×10-6 | (5–9)×10-6 |
| Ọnụọgụ mgbasawanye okpomọkụ, perpendicular na magnetization (1/K) | (1–3)×10-6 | (10–13)×10-6 |
| Ike mgbanwe(N/mm2) | 200–400 | 150–180 |
| Ike mkpakọ(N/mm2) | 1000–1100 | 800–1000 |
| Ike ọdụdọ(N/mm2) | 80–90 | 35–40 |
| Vickers isi ike(HV) | 500–650 | 400–650 |
| Eletrikiresistivity(Ω·cm) | (110–170)×10-6 | (50–90)×10-6 |
Oge nzipu: Jun-05-2023