Yog ntshiab nickel sib nqus
Raws li 28th kev hloov tsheb hlau nyob rau hauv lub rooj ntu, Nickel cov khoom sib nqus nyob twj ywm ua kom tsis paub meej, nyob hauv qhov kev tshawb nrhiav rau kev tshawb nrhiav kev tshawb fawb. Txij li thaum nws tsis pom zoo ntawm xyoo pua 18th, npib tsib xee lub cev sib nqus tau muaj kev sib nqus ntau tiam neeg ntawm lub cev. Nws ua rau cov tsis muaj zog ntawm cov hlau muaj zog ntawm cov hlau tsis ua tiav paramagnetism ntawm txhuas. Qhov no "cov cuab yeej tsis meej" sib nqus, qee qhov chaw hauv nruab nrab, tau coj cov kws tshawb fawb ze li ob lub xyoo los txiav txim siab nws lub hauv paus.
Lub sib nqus ntawm cov ntshiab npib tsib xee
Ntshiab Nickel cov khoom ua pov thawj tsis muaj zog ferromagnetism ntawm chav sov, nrog kev sib nqus lub zog ntawm li 55 emu / g thiab ib qho kev sib tw ntawm kwv yees li 100 oe. Cov cuab yeej no tso cai rau nws tau nyiam los ntawm cov hlau nplaum tas mus li thaum tsis tuav lub siab txias magnetism ntawm hlau. Qhov no "cov sib nqus muag khoom" cov khoom lag luam steels los ntawm nws cov cim hluav taws xob muaj yim ntxiv thiab peb nrog kev sib tw ntawm Net sib tw, ua rau muaj kev sib tw tsis tau tso tseg. Thaum coob tus nab npawb ntawm Nickel atoms aggregate, cov montagici montents form spontaneously magnetized cheeb tsam (thawj) los ntawm kev sib txuas lus sib pauv. Txawm li cas los xij, nyob rau hauv qhov tsis muaj ntawm sab nraud sib nqus daim teb, cov thawj tau sib npaug thiab ua kom pom muaj macroscopic.
Thaum ib daim teb sib nqus sab nraud yog siv, kev sib nqus ntawm cov ntshiab npib npib tsib xee ua haujlwm peb:
Reversible Magnetization (0-500 OE): Tus sau phab ntsa maj mam txav, thiab kev siv hluav taws xob sib zog yog linearly sib luag mus rau sab nraud sib nqus.
Barkhausen dhia (500-1000 oe): tus sau phab ntsa tam sim ntawd txav, ua rau kev hloov pauv theem hauv kev siv cov sib txawv.
Near-saturation (>1000 oe): Txhua qhov chaw nyob yog qhov tseem ceeb ua ke, thiab nce ntxiv hauv kev siv hluav taws xob kom sov.
Cov xeeb ceem no muab cov piam thaj ntshiab tsis tshua muaj kev sib nqus hauv cov khoom sib nqus, nrog EDDY cov khoom sib nqus, ua rau cov khoom siv sidson, ua rau nws cov khoom siv hluav taws xob zoo tagnrho rau hluav taws xob.
Peb qhov tseem ceeb cuam tshuam rau cov khoom sib nqus
Cov nyhuv ntawm qhov kub ntawm cov khoom sib nqus
Qhov ntsuas kub los ntawm lub ntshiab npib tsib xee yog 631 K (358 degree). Hauv qab no, nws ua pov thawj ferromagnetism, thaum siab dua qhov ntsuas kub no, nws hloov mus rau hauv paramagnetism. Kev sim cov ntaub ntawv qhia tau tias kev sib nqus cov tau ntxim nyiam yog 3.2 {{{{{} × 10-4 thaum rhuab mus rau 300 degree. Qhov kub siab no rhiab yog siv nyob rau hauv thermal sensors: nickel-raws li cov cua sov tuaj yeem ua tiav qhov tseeb yog qhov tseeb ntawm 0.1 Qib nyob rau hauv ntau -50 Qib mus rau 200 degree.
Shaping cov nyhuv ntawm crystal qauv
Lub ntsej muag -} Chaw Sau lo lus sau lo teb (FCC) Cov Neeg Npib Npib Nickel ntawm chav tsev kub muab nws anisotropic sib nqus nqus cov hlauetic permeability. Thaum magnetized raws [100] Crystal Kev Taw Qhia, Lub Sib Nqus Permeability Mus Txog 1.2 {{{{{{{{{× 10 × 10-6 h / m. Ib leeg-siv cov npib nyiaj npaj tau los ntawm cov kev ntsuas thev naus laus zis tuaj yeem ua tiav lub zog sib nqus ntawm kev ua tau zoo ntawm cov hlau nplaum.
Alloying li txoj kev
Ntxiv 30% hlau los ua ib permalloy (ni -}}}}}}} tuaj yeem ua rau nws cov kev txiav txim siab ntawm 10, 1,000 zaus uas muaj npib tsib leeg. Ntxiv 5% cobalt rau ib npib tsib xee- Cobalt alloy txo nws txoj kev xaiv sib tw rau cov ntaub ntawv sau npe sib nqus. Qhov no alloying lub tswv yim pab txhawb nqa Nickel {12} Kev sib nqus cov ntaub ntawv los them rau tag nrho cov khoom siv, los ntawm cov hlau nplaum muag rau cov hlau nplaum.
Plaub txiav - ntug kev siv ntawm kev tsav sib nqus
Sib Nqus Shielding rau Quatum Xam
Nyob rau hauv superconducting quapits, flux ntxiab uas muaj los ntawm cov yeeb yaj kiab nyias nyias muaj peev xwm txo lub sijhawm sib nqus Siv lub npe tsib xee - Raws li sib nqus ntawm cov ntaub thaiv me me hauv ib lub quarum GATE Operations tau nce los ntawm 99.2% rau 99.97%. Ib qho kev sib nqus tub rog kiv puag ncig hauv lub zog tshiab
Tus Qauv Qauv 3 lub cev muaj zog siv siv npib tsib xee - xob hlau mos mos alloy. Ntawm 20kHz kev ua haujlwm ntau, hlau poob yog txo los ntawm 2.5W / kg rau cov tsoos silicon steel steels rau 98.5% thiab 15% nce ntau yam.
Sib nqus Navigation hauv biomedicine
Nickel nanoparticles nrog ib lub cheeb ntawm 50nm tsim kom muaj qhov hluav taws xob hauv zos thermal, ua kom cov thermal magnal ntawm cov qog hlwb. Kev sim khomob tau pom tias qhov no hyperthrickia kev kho mob cancer thiab ua rau cov ntaub so ntswg tsawg dua li cov ntaub so ntswg zoo li qub.
Los ntawm kev tshawb pom ntawm Nickel lub Magnetism hauv lub xyoo pua 18th rau kev tsim kho Nickel}} Base} Ua kom muaj cov neeg siv Nickel tau txuas ntxiv kom tob. Tam sim no, cov kws tshawb fawb tab tom tshawb nrhiav qhov ua tiav xoom {{4 4}} lub zog sib nqus los ntawm manipulating cov neeg sib nqus sib nqus. Hauv kev lag luam, 3D tshuab luam ntawv thev naus laus zis tau ua rau cov customized ntau lawm ntawm nickel {{}} raws li cov khoom siv sib nqus ib qho kev muaj tiag.
