Enwere ike iji ihe ndọta samarium cobalt mee ihe karịa afọ iri - nkwụsi ike ogologo oge nke samarium cobalt na oke okpomọkụ.

Nkwụsi ike ogologo oge nke magnet bụ nchegbu nke onye ọrụ ọ bụla. Nkwụsi ike nke ihe ndọta samarium cobalt (SmCo) dị mkpa maka gburugburu ngwa ngwa ha siri ike. N'afọ 2000, Chen^[1]na Liu^[2]et al., Na-amụ ihe mejupụtara na nhazi nke SmCo okpomọkụ dị elu, ma mepụta ihe ndọta samarium-cobalt na-eguzogide okpomọkụ. Okpomọkụ kachasị arụ ọrụ (T_max) nke ihe ndọta SmCo si na 350°C ruo 550°C. Mgbe nke ahụ gasịrị, Chen et al. kwalitere nguzogide oxidation nke SmCo site na itinye nickel, aluminom na mkpuchi ndị ọzọ na magnet SmCo.

Na 2014, Dr. Mao Shoudong, onye nchoputa nke "MagnetPower", ji nlezianya mụọ nkwụsi ike nke SmCo na okpomọkụ dị elu, na e bipụtara nsonaazụ ya na JAP.^[3]. Nsonaazụ izugbe bụ nke a:

1. MgbeSmCodị na ọnọdụ okpomọkụ dị elu (500 ° C, ikuku), ọ dị mfe ịmepụta oyi akwa nbibi n'elu. Ihe mejupụtara oyi akwa a na-emebi emebi bụ nke mpụtara n'ọnụ ọgụgụ (Samarium na-agwụcha) na oyi akwa dị n'ime (ọtụtụ oxides). Ebibiri ihe owuwu bụ isi nke magnetik SmCo na oyi akwa mmebi. Dị ka e gosiri na foto 1 na eserese 2.

Fig.1. Ihe micrographs anya nke Sm₂Co₁₇magnets isothermal na-emeso ya na ikuku na 500 Celsius maka oge dị iche iche. Ndabere n'ígwé n'okpuru elu nke (a) yiri na (b) perpendicular na c-axis.

Fig.2. BSE micrograph na EDS ọcha akara-nyocha n'ofe Sm₂Co₁₇magnets isothermal na-emeso ya na ikuku na 500 Celsius maka 192 h.

2. The isi guzobe nke mmebi oyi akwa budata emetụta magnetik Njirimara nke SmCo, dị ka e gosiri na Figure 3. The mbibi n'ígwé na-tumadi esịnede Co (Fe) ngwọta siri ike, CoFe2O4, Sm2O3, na ZrOx na esịtidem n'ígwé na Fe3O4, CoFe2O4, na CuO na akpịrịkpa mpụga. Co(Fe), CoFe2O4, na Fe3O4 rụrụ ọrụ dị ka usoro ndọta dị nro ma e jiri ya tụnyere usoro ndọta siri ike nke ihe ndọta Sm2Co17 nke etiti na-emetụtaghị. Ekwesịrị ịchịkwa omume mmebi ahụ.

Fig. 3. The magnetization akụkụ nke Sm₂Co₁₇magnets isothermal na-emeso ya na ikuku na 500 Celsius maka oge dị iche iche. Nnwale ule nke magnetization curves bụ 298 K. Mpụga ubi H yiri nke c-axis nhazi nke Sm.₂Co₁₇ihe ndọta.

3. Ọ bụrụ na a na-edobe mkpuchi nke nwere nnukwu ihe mgbochi oxidation na SmCo iji dochie ihe mkpuchi electroplating mbụ, usoro mmebi nke SmCo nwere ike ime ka ọ dịkwuo mma na nkwụsi ike nke SmCo nwere ike imeziwanye, dị ka e gosiri na Figure 4. Ngwa nke SmCo.MA ọ bụ mkpuchina-egbochi mmụba dị arọ nke SmCo na mfu nke ihe ndọta.

Fig.4 nhazi nke nguzogide oxidation ma ọ bụ mkpuchi na Sm₂Co₁₇magnet.

"MagnetPower" ka kemgbe rụrụ nnwale nke ogologo oge kwụsie ike (~ 4000hours) na elu-okpomọkụ, nke nwere ike inye a kwụsie ike kwuru SmCo magnet maka ọdịnihu ojiji na elu okpomọkụ.

Na 2021, dabere na oke okpomọkụ achọrọ, "MagnetPower" ewepụtala usoro akara ule site na 350°C ruo 550°CT usoro.) Akara ule ndị a nwere ike inye nhọrọ zuru oke maka ngwa SmCo okpomọkụ dị elu, yana akụrụngwa magnetik bara uru karị. Dịka egosiri na eserese 5. Biko rụtụ aka na ibe weebụ maka nkọwa:https://www.magnetpower-tech.com/t-series-sm2co17-smco-magnet-supplier-product/

Fig.5 The elu okpomọkụ SmCo magnets (T usoro) nke "MagnetPower"

NKWUBIOKWU

1. Dị ka a ukwuu ike obere ụwa na-adịgide adịgide ndọta, SmCo nwere ike ji mee ihe na elu okpomọkụ (≥350°C) maka a obere oge. The elu okpomọkụ SmCo (T usoro) nwere ike tinye na 550C na-enweghị irreversible demagnetization.

2. Otú ọ dị, ma ọ bụrụ na SmCo magnetik na-eji na elu okpomọkụ (≥350 ° C) ruo ogologo oge, elu na-adịkarị mfe na-emepụta a mkpọda oyi akwa. Iji mkpuchi mgbochi oxidation nwere ike hụ na nkwụsi ike nke SmCo na oke okpomọkụ.

Ntụaka

[1] CHChen, IEEE Azụmahịa na Magnetik, 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)