Kodi maginito a cobalt samarium angagwiritsidwe ntchito kwa zaka zoposa khumi--kukhazikika kwa nthawi yayitali kwa samarium cobalt pa kutentha kwakukulu

Kukhazikika kwanthawi yayitali kwa maginito ndikodetsa nkhawa kwa aliyense wogwiritsa ntchito. Kukhazikika kwa maginito a samarium cobalt (SmCo) ndikofunikira kwambiri pamagwiritsidwe ake ovuta. Mu 2000, Chen[1]ndi Liu[2]et al., phunzirani kapangidwe kake ndi kapangidwe ka SmCo yotentha kwambiri, ndikupanga maginito osatentha kwambiri a samarium-cobalt. Kutentha kwakukulu kwa ntchito (Tmax) ya maginito a SmCo anawonjezeka kuchoka pa 350°C kufika pa 550°C. Pambuyo pake, Chen et al. idathandizira kukana kwa okosijeni kwa SmCo poyika faifi tambala, aluminiyamu ndi zokutira zina pamagetsi a SmCo.

Mu 2014, Dr. Mao Shoudong, yemwe anayambitsa "MagnetPower", anaphunzira mwadongosolo kukhazikika kwa SmCo pa kutentha kwakukulu, ndipo zotsatira zake zinasindikizidwa mu JAP.[3]. Zotsatira zake ndi izi:

1. PameneSmCondi kutentha kwambiri (500 ° C, mpweya), n'zosavuta kupanga wosanjikiza kuwonongeka pamwamba. Chiwopsezo chowonongeka chimapangidwa makamaka ndi sikelo yakunja (Samarium yatha) ndi gawo lamkati (ma oxides ambiri). Mapangidwe oyambira a maginito a SmCo adawonongeka kwathunthu pakuwonongeka. Monga momwe chithunzi 1 ndi chithunzi 2 chikusonyezera.

Chithunzi 1Chithunzi 1. Ma micrographs owoneka bwino a Sm2Co17maginito isothermal ankachitira mu mpweya pa 500 °C kwa nthawi zosiyanasiyana. Zigawo zowonongeka pansi pa malo omwe ali (a) ofanana ndi (b) perpendicular kwa c-axis.

Chithunzi 2

Chithunzi 2. BSE micrograph ndi zinthu za EDS mzere-scan kudutsa Sm2Co17maginito isothermal ankachitira mu mpweya pa 500 °C kwa 192 h.

2. Kupanga kwakukulu kwa kusanjikiza kowonongeka kumakhudza kwambiri maginito a SmCo, monga momwe tawonetsera pa Chithunzi 3. Zigawo zowonongeka zinali makamaka zopangidwa ndi Co (Fe) njira yolimba, CoFe2O4, Sm2O3, ndi ZrOx mu zigawo zamkati ndi Fe3O4, CoFe2O4, ndi CuO mu masikelo akunja. The Co (Fe), CoFe2O4, ndi Fe3O4 anachita monga zofewa maginito magawo poyerekeza ndi zovuta maginito gawo chapakati osakhudzidwa Sm2Co17 maginito. Khalidwe lonyozeka liyenera kuyendetsedwa.

Chithunzi 3

Chithunzi 3. Ma magnetization curves a Sm2Co17maginito isothermal ankachitira mu mpweya pa 500 °C kwa nthawi zosiyanasiyana. Kutentha kwa mayeso a ma curve a magnetization ndi 298 K. Munda wakunja wa H ukufanana ndi kulumikizana kwa c-axis kwa Sm.2Co17maginito.

3. Ngati zokutira ndi kukana mkulu makutidwe ndi okosijeni waikidwa pa SmCo m'malo choyambirira zokutira electroplating, ndi kuwonongeka ndondomeko SmCo akhoza kwambiri choletsa ndi kukhazikika kwa SmCo akhoza bwino, monga momwe chithunzi 4. Kugwiritsa ntchitoOR zokutirakwambiri ziletsa kuwonjezeka kulemera kwa SmCo ndi imfa ya maginito katundu.

Chithunzi 4

Fig.4 kapangidwe ka kukana kwa okosijeni KAPENA zokutira pa Sm2Co17maginito.

"MagnetPower" wakhala ikuchitika zatsopano kukhazikika kwa nthawi yaitali (~ 4000hours) pa kutentha kwambiri, amene angapereke umboni bata la maginito SmCo ntchito m'tsogolo pa kutentha.

Mu 2021, kutengera kutentha kwambiri kwa ntchito, "MagnetPower" yapanga magiredi angapo kuchokera pa 350 ° C mpaka 550 ° C .T mndandanda）. Maphunzirowa angapereke zosankha zokwanira zogwiritsira ntchito kutentha kwapamwamba kwa SmCo, ndipo maginito amapindulitsa kwambiri. Monga momwe zasonyezedwera pa Chithunzi 5. Chonde onani tsambali kuti mudziwe zambiri:https://www.magnetpower-tech.com/t-series-sm2co17-smco-magnet-supplier-product/

 

Chithunzi 5

Fig.5 The mkulu kutentha SmCo maginito (T mndandanda) wa "MagnetPower"

MAPETO

1. Monga khola kwambiri osowa dziko maginito okhazikika, SmCo angagwiritsidwe ntchito pa kutentha (≥350 ° C) kwa nthawi yochepa. Kutentha kwakukulu kwa SmCo (T mndandanda) kungagwiritsidwe ntchito pa 550 ° C popanda demagnetization yosasinthika.

2. Komabe, ngati maginito SmCo ntchito pa kutentha (≥350 ° C) kwa nthawi yaitali, pamwamba sachedwa kutulutsa wosanjikiza kuwonongeka. Kugwiritsa ntchito anti-oxidation zokutira kungatsimikizire kukhazikika kwa SmCo pa kutentha kwakukulu.

 

Buku

[1] CCHhen, IEEE Transactions pa Magnetics, 36, 3291-3293, (2000);

[2] JF Liu, Journal of Applied Physics, 85, 2800-2804, (1999);

[3] Shoudong Mao, Journal of Applied Physics, 115, 043912,1-6 (2014)

Nthawi yotumiza: Jul-08-2023