Alnico yog thawj tsim los ua cov khoom siv hlau nplaum uas nyob ruaj khov, uas yog ib qho txhuas ntawm txhuas, nickel, cobalt, hlau thiab lwm yam kab hlau. Alnico cov ntaub ntawv magnet tas mus li xyoo 1930s.
Lub npe: Alnico
Cov Cwj Pwm: Hlau cov khoom siv hlau cov khoom ntiag tug
Zoo: qhov zoo tshaj plaws sib nqus cov khoom, kub coefficient thiab me me
Cov Txheej Txheem Ntau Lawm: Sintering thiab Casting
AlNiCo yog lub pob zeb qhuav tsim txav, uas yog ib qho txhuas ntawm txhuas, nickel, cobalt, hlau thiab lwm yam kab hlau. Alnico cov ntaub ntawv magnet tas mus li xyoo 1930s. Nyob rau ntawm lub sij hawm ntawd, nws zoo tshaj plaws sib nqus khoom, kub coefficient thiab me me, yog li feem ntau dav siv nyob rau hauv lub sab saum toj hlau tshuab. Txij li thaum xyoo 1960, nrog lub ferrite cov hlau nplaum thiab lub ntiaj teb tsis tshua muaj hlau nplaum, lub npe ntawm AlNiCo hlau nplaum nyob hauv hluav taws xob cov hluav taws xob tau hloov lawm thiab cov kev faib ua feem ntawm lawv tau poob.
Raws li qhov sib txawv ntawm tus txheej txheem muab faib ua Sintered AlNiCo (Sintered AlNiCo) thiab nrum AlNiCo (Cam Khwb AlNiCo). Khoom siv thiab ntau dua thiab square duab. Txoj kev ua tus casting tau machined rau ntau thiab tsawg; cov khoom sintered yog tawm rau ib qho me me me tshaj qhov casting, ua rau ib qho zoo siab ntawm lub voj voog ntau tshaj qhov khoom sib tw, nrog me ntsis nqhis zog ntau tshaj qhov khoom cam, tab sis Ua zoo dua. Nyob rau hauv cov ntaub ntawv uas muaj hlau nplaum, nruam cov xim hlau nickel-cobalt cov hlau nplaum tas li yog qhov kub siab tshaj qhov ntxim siab, qhov kub ua haujlwm ua tau siab npaum li 600 degrees Celsius. Alnico cov khoom siv hlau nplaum tas li yog dav siv ntau yam twj paj nruag thiab lwm yam kev siv.
Cov hlau nplaum Alnico muaj qhov kom zoo dua ntawm kev txav ntawm maganism (txog li 1.35T) nrog rau qhov ntsuas kub tsawg. Qhov kub coefficient ntawm -0.02% / ℃, qhov siab tshaj plaws kub li 520 ℃. Qhov tsis zoo yog tias lub coercivity qes qis heev (feem ntau tsawg dua 160 kA / m) thiab qhov kev nkhaus ntawm qhov tsis zoo yog tsis muaj linear. Yog li ntawd, alnico magnet txawm hais tias yooj yim yuav tsum tau magnetized, nws kuj yog yooj yim rau demagnetization.