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E ʻeʻe a i ʻole e hana i kahi moʻokāki
Aneodymium magnet(ʻike pū ʻia ʻoNdFeB,NIBa i ʻoleNeomagnet) ʻo ia ka mea i hoʻohana nui ʻiamagnet honua rare.He amagnet mauhana ʻia mai kahihuikauoneodymium,hao, aboronae hana i ka Nd2Fe14Bketragonalʻano ʻano kristal.Hoʻomohala kūʻokoʻa i ka makahiki 1984 eNā Motors NuiaNā Metala Kūikawā Sumitomo, ʻO nā magnet neodymium ke ʻano ikaika loa o ka magnet mau loa i loaʻa ma ke kālepa.Hiki ke hoʻokaʻawale ʻia nā magnet NdFeB e like me ka sintered a i hoʻopaʻa ʻia paha, ma muli o ke kaʻina hana i hoʻohana ʻia.Ua hoʻololi lākou i nā ʻano magnets ʻē aʻe i nā noi he nui i nā huahana hou e koi ai i nā magnet mau loa, e like menā kaʻa uilai nā mea hana cordless,paʻa disk drivea me nā mea hoʻopaʻa magnetic.
Waiwai
Papa helu
Hoʻopili ʻia nā magnet neodymium e like me kā lākouhuahana ikehu kiʻekiʻe, e pili ana i kahoʻoheheʻe magneticpuka i kēlā me kēia leo.Hōʻike nā waiwai kiʻekiʻe i nā magnet ikaika.No nā mākēneki NdFeB sintered, aia kahi hoʻohālikelike honua ākea.ʻO kā lākou mau waiwai mai ka N28 a hiki i ka N55.ʻO ka leka mua N ma mua o nā waiwai he pōkole no ka neodymium, ʻo ia hoʻi nā magnet NdFeB sintered.Hōʻike nā leka ma hope o nā waiwai i ka coercivity intrinsic a me nā mahana hana kiʻekiʻe loa (pili maikaʻi me kaKa wela Curie), mai ka paʻamau (a hiki i 80 °C a i ʻole 176 °F) a i TH (230 °C a i ʻole 446 °F).
Nā papa o nā mākēneki NdFeB sintered:
- N30 – N55
- N30M – N50M
- N30H – N50H
- N30SH – N48SH
- N30UH – N42UH
- N28EH – N40EH
- N28TH – N35TH
Nā waiwai mākēneki
ʻO kekahi mau waiwai koʻikoʻi i hoʻohana ʻia e hoʻohālikelike i nā magnet mau loa:
- Ka noho ʻana(Br), ka mea e ana i ka ikaika o ke kahua magnetic.
- ʻO ka hoʻokoe ʻana(Hci), ke kū'ē o ka mea i ka lilo ʻana i demagnetized.
- huahana ikehu kiʻekiʻe(BHmax), ka mānoanoa o ka ikehu magnetic, i hōʻike ʻia e ka waiwai nui omānoanoa flux mānoanoa(B) manawaikaika mānoanoa(H).
- Ka wela Curie(TC), ka mahana e nalowale ai ka mea hoʻokalakupua.
ʻOi aku ka kiʻekiʻe o ka neodymium magnet, ʻoi aku ka kiʻekiʻe o ka coercivity a me ka huahana ikehu, akā ʻoi aku ka haʻahaʻa o ka mahana Curie ma mua o nā ʻano magnet ʻē aʻe.ʻO nā huila neodymium magnet kūikawā e komo pū anahoʻopaʻapaʻaadysprosiumua hoʻomohala ʻia i ʻoi aku ka kiʻekiʻe o ka mahana Curie, e ʻae iā lākou e ʻae i nā mahana kiʻekiʻe. Hoʻohālikelike ka papa ma lalo nei i ka hana magnetic o nā magnet neodymium me nā ʻano magnet mau loa.
Nā waiwai kino a me ka mechanical
| Waiwai | Neodymium | Sm-Co |
|---|---|---|
| Ka noho ʻana(T) | 1–1.5 | 0.8–1.16 |
| ʻO ka hoʻokoe ʻana(MA/m) | 0.875–2.79 | 0.493–2.79 |
| Recoil permeability | 1.05 | 1.05–1.1 |
| ʻO ke koena wela o ka noho ʻana (%/K) | −(0.12–0.09) | −(0.05–0.03) |
| Kaumaha wela o ka coercivity (%/K) | −(0.65–0.40) | −(0.30–0.15) |
| Ka wela Curie(°C) | 310–370 | 700–850 |
| ʻO ka mānoanoa (g/cm3) | 7.3–7.7 | 8.2–8.5 |
| Koefficient hoʻonui wela, e like me ka magnetization (1/K) | (3–4)×10−6 | (5–9)×10−6 |
| Koefficient hoʻonui wela, kū pololei i ka magnetization (1/K) | (1–3)×10−6 | (10–13)×10−6 |
| Ka ikaika wiliwili(N/mm2) | 200–400 | 150–180 |
| Ka ikaika compressive(N/mm2) | 1000–1100 | 800–1000 |
| Ka ikaika tensile(N/mm2) | 80–90 | 35–40 |
| ʻO ka paʻakikī o Vickers(HV) | 500–650 | 400–650 |
| Uilakūʻē(Ω·cm) | (110–170)×10−6 | (50–90)×10−6 |
Ka manawa hoʻouna: Jun-05-2023