Menene iyakar zazzabi na samarium cobalt maganadiso?

Samarium cobalt magnets (SmCo) galibi ana amfani dashi azaman zaɓi don matsananciyar yanayi don juriyar yanayin zafi. Amma menene iyakar zafin samarium cobalt? Wannan tambaya ta zama mafi mahimmanci yayin da yawan matsananciyar yanayin aikace-aikacen ke ƙaruwa. Zazzabi na Curie na kayan ferromagnetic yawanci shine mafi girman iyakar zafin aikace-aikacen. Sama da wannan zafin jiki, maganadisu yana canzawa daga yanayin ferromagnetic zuwa yanayin paramagnetic, kuma baya da ƙarfin halayen maganadisu. Misali, Curie zafin jiki na 2:17 SmCo yana kusan 820°C, kuma na 1:5 SmCo yana kusan 750°C. Abun da ke ciki da tsarin maganadisu koyaushe sun bambanta, yanayin zafin Curie ya ɗan bambanta, amma gabaɗaya yana cikin wannan kewayon. Kamar yadda aka nuna hoto na 1.

Hoto 1. Curie zafin jiki na daban-daban m maganadisu

Koyaya, a cikin ainihin aikace-aikacen, SmCo maganadiso suna da haɗari ga asarar maganadisu mara jurewa lokacin da zafin jiki ya yi ƙasa da zafin Curie. Matsakaicin zafin jiki (Tmax) na SmCo yana iyakance ta ƙimar ƙimar ƙarfin ƙarfi da wurin aiki wanda ya haifar da nau'ikan nau'ikan maganadisu. Idan an yi amfani da lanƙwan BH a cikin quadrant na biyu azaman madaidaiciyar layi azaman ma'aunin hukunci (Chen, JAP, 2000), Tmax na maganadisu na SmCo da aka saba amfani da su baya wuce 350°C. Kamar yadda aka nuna a cikin Hoto 2, kyawawan kaddarorin magnetic na 32H magnet a 20 ° C shine Br≥11.3kGs, Hcj≥28kOe, Hk≥21kOe, da BHmax≥30.5kOe. Koyaya, ma'aunin zafin jiki β (20-350 °C) na tilastawa na ciki na Hcj shine 0.042%, kuma layin BH nasa har yanzu yana da wahalar kiyaye cikakken madaidaiciyar layi a cikin kwata na biyu a 350 °C.

Hoto 2, yanayin zafin jiki na 32H.

Hangzhou Magnet Power Co.Ltd ya ɓullo da jerin high zafin jiki resistant SmCo maganadiso (T jerin) daga 350 °C zuwa 550 °C. Kamar yadda aka nuna a cikin hoto na 3, waɗannan maɗaukaki suna daga T350 tare da Tmax na 350 ° C zuwa T550 tare da Tmax na 550 ° C. Don takamaiman aiki, da fatan za a koma hanyar haɗin yanar gizonhttps://www.magnetpower-tech.com/t-series-sm2co17-smco-magnet-supplier-product/.Wannan abu ya dace da aikace-aikacen zafin jiki mai zafi kamar masana'antar sinadarai, turbine da sauransu.