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Aneodymium maganadisu(kuma aka sani daNdFeB,NIBkoNeomagnet) shine mafi yawan amfani da nau'inMagnet na duniya rare.Yana da amaganadisu na dindindinsanya daga angaminaneodymium,baƙin ƙarfe, kumaborondon samar da Nd2Fe14Btetragonaltsarin crystalline.An haɓaka kansa a cikin 1984 taGeneral MotorskumaSumitomo Special Metals, Neodymium maganadiso su ne mafi ƙarfi irin na dindindin maganadisu samuwa a kasuwanci.NdFeB maganadiso za a iya classified a matsayin sintered ko bonded, dangane da masana'antu tsarin amfani.Sun maye gurbin wasu nau'ikan maganadisu a cikin aikace-aikace da yawa a cikin samfuran zamani waɗanda ke buƙatar ƙaƙƙarfan maganadisu na dindindin, kamarinjinan lantarkia cikin kayan aiki marasa igiya,rumbun kwamfutarkada Magnetic fasteners.
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Neodymium maganadiso ana yi masu daraja gwargwadon sumatsakaicin samfurin makamashi, wanda ke da alaƙa dakarfin maganadisufitarwa a kowace juzu'in raka'a.Maɗaukakin ƙima suna nuna ƙaƙƙarfan maganadisu.Don maganadiso NdFeB mai sirƙira, akwai sanannen rarrabuwa na duniya.Darajarsu ta kai daga N28 zuwa N55.Harafin farko N kafin ƙimar gajeriyar neodymium, ma'ana sintered magnets NdFeB.Haruffa masu biye da dabi'u suna nuna tsananin ƙarfi da matsakaicin yanayin aiki (yana da alaƙa da madaidaicinCurie zafin jiki), wanda ke iyaka daga tsoho (har zuwa 80 ° C ko 176 ° F) zuwa TH (230 ° C ko 446 ° F).
Darajoji na sintered magnets NdFeB:
- N30 - N55
- N30M - N50M
- N30H - N50H
- N30SH - N48SH
- N30UH - N42UH
- N28EH - N40EH
- N28TH - N35TH
Magnetic Properties
Wasu mahimman kaddarorin da ake amfani da su don kwatanta maganadisu na dindindin sune:
- Kasancewa(Br), wanda ke auna ƙarfin filin maganadisu.
- Tilastawa(Hci), juriya na abu don zama demagnetized.
- Matsakaicin samfurin makamashi(BHmax), da yawa na Magnetic makamashi, halin da matsakaicin darajarMagnetic juzu'in yawa(B) sauƙarfin filin maganadisu(H).
- Curie zafin jiki(TC), yanayin zafi wanda kayan ya rasa magnetism.
Neodymium maganadiso yana da mafi girma remanence, mafi girma ƙarfi ƙarfi da makamashi samfurin, amma sau da yawa rage Curie zafin jiki fiye da sauran nau'in maganadiso.Musamman neodymium magnet alloys wanda ya haɗa daterbiumkumadysprosiuman haɓaka waɗanda ke da mafi girman zafin jiki na Curie, yana ba su damar jure yanayin zafi mai girma. Teburin da ke ƙasa yana kwatanta aikin maganadisu na neodymium maganadiso da sauran nau'ikan maganadisu na dindindin.
Jiki da na inji Properties
| Dukiya | Neodymium | Sm-Co |
|---|---|---|
| Kasancewa(T) | 1-1.5 | 0.8-1.16 |
| Tilastawa(MA/m) | 0.875-2.79 | 0.493-2.79 |
| Maimaituwa mara kyau | 1.05 | 1.05-1.1 |
| Matsakaicin yawan zafin jiki (%/K) | (0.12-0.09) | (0.05-0.03) |
| Matsakaicin zafin jiki na tilastawa (%/K) | (0.65-0.40) | (0.30-0.15) |
| Curie zafin jiki(°C) | 310-370 | 700-850 |
| Yawan yawa (g/cm3) | 7.3-7.7 | 8.2-8.5 |
| Ƙididdigar faɗaɗawar thermal, daidai da maganadisu (1/K) | (3–4)×10-6 | (5–9)×10-6 |
| Ƙididdigar faɗaɗawar thermal, perpendicular zuwa magnetization (1/K) | (1-3)×10-6 | (10-13)×10-6 |
| Ƙarfin sassauƙa(N/mm2) | 200-400 | 150-180 |
| Ƙarfin matsi(N/mm2) | 1000-1100 | 800-1000 |
| Ƙarfin ƙarfi(N/mm2) | 80-90 | 35-40 |
| Vickers taurin(HV) | 500-650 | 400-650 |
| Lantarkiresistivity(Ω·cm) | (110-170)×10-6 | (50-90)×10-6 |
Lokacin aikawa: Juni-05-2023