Niobium-titanium Superconducting Joints

Kev sib txuas ntawm quantum technology thiab superconductivity
Quantum xam thiab kev sib txuas lus cia siab rau cov khoom siv superconducting xws li niobium titanium capillary hlab.

Niobium Titanium capillary raj

Khoom siv ntawm Nb-Ti capillary raj: Ti-45Nb, Nb53 feem pua ​​​​Ti47 feem pua, Nb-50 feem pua ​​Ti
Specification ntawm Niobium-Titanium capillary raj:
OD1mm X Phab Ntsa Thickness 0.14mm X 1000mm
OD1.4mm X Phab Ntsa Thickness 0.14mm X 1000mm
OD2.2mm X Phab Ntsa Thickness 0.18mm X 1500mm

 

Niobium Titanium superconducting pob qij txha

Vim yog xoom tsis kam ntawm superconducting cov ntaub ntawv, Niobium-titanium (Nb-Ti) superconducting pob qij txha feem ntau yog siv los ua superconducting cables hauv kev lag luam fais fab.

 

Txhawm rau muab qhov chaw sib nqus ultra-ruaj khov, kev ua haujlwm tsis tu ncua hauv cov hlau nplaum superconducting yuav tsum muaj cov pob qij txha superconducting. Ntawm no, peb muab cov ncauj lus kom ntxaws qhia txog kev ntsuam xyuas ntawm niobium-titanium superconducting pob qij txha uas tau tsim rationally. Ob hom hlau lead-bismuth (Pb-Bi) solder, suav nrog Pb42Bi58 raws li cov khoom siv tshiab, tau siv rau hauv cov txheej txheem hloov cov txheej txheem los tsim cov khoom siv hluav taws xob ntau rau kev siv tswv yim. Ntawm 4.2 K, tag nrho cov pob qij txha tau mus txog qhov tseem ceeb ntawm qhov tam sim no ntau dua 200 A. Hauv kev sim kaw-kho, peb cov txheej txheem txhim kho superconducting koom ua ke tsim tag nrho cov hluav taws xob tiv thaiv ntawm 3.25 1014 ntawm 4.2 K hauv nws tus kheej. Qhov kawg tab sis tsis kawg, kev ua haujlwm tsis tu ncua hauv Nb-Ti solenoid coil nrog qhov hloov pauv tsis tu ncua tam sim no tau tshwm sim.Qhov kev tshawb fawb no yuav qhib qhov rooj rau kev tsim cov kev ua haujlwm siab Nb-Ti superconducting pob qij txha rau kev siv tiag tiag.

 

Nws tsis tuaj yeem tsim cov hlau nplaum muaj zog hauv qhov chaw me me uas siv cov hlau nplaum zoo tib yam (Cu) raws li cov hlau nplaum, tab sis cov hlau nplaum superconducting tuaj yeem ua tau. Superconducting hlau nplaum feem ntau yog ua los ntawm niobium-titanium (Nb-Ti), uas muaj qhov kub thiab txias (Tc) ntawm 9.2 K thiab siv ntau yam kev siv hauv ntiaj teb. Lub peev xwm los tsim kev ntseeg siab "superconducting joints" yog ib qho ntawm cov yam ntxwv tshwj xeeb ntawm Nb-Ti uas ua rau nws haum rau feem ntau ntawm cov ntawv thov kev lag luam. Nb-Ti hlau nplaum tuaj yeem ua haujlwm nyob rau hauv hom tsis tu ncua thiab ua tiav qhov chaw sib nqus ultra-ruaj khov (ntev ntev ntawm qhov sib nqus ntawm qhov kev txiav txim ntawm 0.1 ppm / h) ua tsaug rau cov pob qij txha superconducting1.

Ob qhov kawg ntawm Nb-Ti superconducting hlau nplaum yuav tsum tau txuas mus rau qhov txuas mus ntxiv-tam sim no hloov (PCS) siv Niobium-titanium superconducting pob qij txha txhawm rau txhawm rau ua haujlwm tsis tu ncua. Lub fabrication ntawm superconducting kev sib txuas ntawm Nb-Ti conductors tau raug tshaj tawm siv ntau yam txuj ci, nrog rau kev hloov matrix solder2,3,4,5,6, ultrasonic welding7, diffusion welding8, txias pressing9,10, thiab chaw vuam 10,11. Los ntawm kev ntseeg siab, cov txheej txheem kev hloov pauv ntawm cov txheej txheem siv lead-bismuth (Pb-Bi) solder, uas yog superconducting ntawm 4.2 K, feem ntau siv nyob rau hauv kev lag luam chaw tsim Nb-Ti pob qij txha 11.Thornton tau tshaj tawm thawj qhov kev ua tau zoo Nb- Ti kev sib txuas tau ua los ntawm kev siv cov txheej txheem kev hloov pauv ntawm cov txheej txheem solder matrix hauv xyoo 19862. Nyob rau hauv qhov chaw ntawm tus kheej ntawm 4.2 K, lub voj kaw nrog ib qho kev sib koom ua ke uas tau tsim sab nraud tuaj yeem ncav cuag qhov tseem ceeb tam sim no ceev (Jc) txog li 143 kA / cm2. . Lub resistivity ntawm ntau yam Nb-Ti junctions tsim los ntawm Swenson li al. Kev siv Thornton mus kom ze tau raug soj ntsuam siv cov txheej txheem plaub-txheej txheem 3. Lawv muaj peev xwm ua kom muaj kev sib koom ua ke ntawm 1 1011 hauv 1 T ntawm 4.2 K. Cov txiaj ntsig ntawm ntau Nb-Ti pob qij txha rau 400 MHz nuclear magnetic resonance hlau nplaum kuj tau tshaj tawm los ntawm Cheng li al.Hauv kev sim kaw, ib qho ntawm lawv cov pob qij txha tau mus txog qhov tseem ceeb tam sim no (Ic) ntawm 89.5 A thiab sib koom ua ke ntawm 1.8 1013 hauv 1 T ntawm 4.2 K. Rau 7 T ​​tsiaj sib nqus resonance imaging (MRI) hlau nplaum, Liu li al. kuj tsim thiab tshuaj xyuas Nb-Ti pob qij txha5. Nws cov pob qij txha, uas tau tsim los ntawm 1.5 1 mm2 Nb-Ti/Cu hlau, muaj Ic ntawm 1,160 A thiab 1.5 1014 hauv 0.6 T ntawm 4.2 K. Tsis ntev los no, xyoo 2015, Motomune thiab al.6 tau tshawb xyuas txoj hauv kev tam sim no hauv Nb-Ti junctions tsim los ntawm kev hloov cov hlau nplaum.Txawm tias qhov tseeb tias Nb-Ti superconducting pob qij txha tau nquag ua hauv MRI sector thiab yog ib feem tseem ceeb ntawm MRI hlau nplaum, tsis tau muaj. Kev tshawb fawb ntau ntawm superconducting koom nrog cov txheej txheem rau multifilamentary Nb-Ti conductors.

Hauv kev teb, ob hom Pb-Bi solder raug soj ntsuam hauv txoj haujlwm no ntawm lawv cov Jc thiab Tc raws li qhov muaj peev xwm ua tau rau Nb-Ti superconducting junctions. Tom qab ntawd SEM tau siv los txiav txim siab lub sijhawm zoo tshaj plaws etching rau Cu matrix nrog tin (Sn) thiab Sn nrog Pb-Bi (SEM). Cov txiaj ntsig no tau coj mus rau kev tsim cov pob qij txha superconducting nyob rau hauv qhov chaw tsis muaj zog ntau los tiv thaiv oxidation thiab lawv cov yam ntxwv ntawm 4.2 K hauv ntau qhov sib nqus. Ib qho tig-tig Nb-Ti kaw-loop coil tau tsim thiab sim siv txoj kev ntsuas kev sib tsoo kom raug txiav txim siab qhov kev sib tshuam. Los ntawm kev ua haujlwm tsis tu ncua-hom kev ua haujlwm hauv tus qauv Nb-Ti hlau nplaum, kev ua haujlwm tsis tu ncua-hom ua haujlwm nyob rau hauv cov khoom tsim tshiab Niobium-titanium superconducting pob qij txha rau cov hlau nplaum txuas ntxiv.

Cov lus xaus
Peb tau piav qhia txog kev hloov pauv ntawm cov khoom siv hluav taws xob rau kev sib txuas ntawm cov khoom siv hluav taws xob ntau Nb-Ti, ua ke nrog cov txiaj ntsig kev xeem rau cov khoom siv hluav taws xob superconducting. Thawj kauj ruam yog kom paub meej tias muaj ob lub Pb-Bi solders, Pb44.5Bi55.5 thiab Pb42Bi58, uas tej zaum yuav muaj kev cuam tshuam rau lawv lub peev xwm superconducting. Ob leeg solders muaj qhov tsis txaus Pb txog li 1.6 feem pua. Cov hlau nplaum Jc ntawm Pb44.5Bi55.5 thiab Pb42Bi58 tau pom tias yog 2.9 103 Acm2 thiab 1.19 103 Acm2, raws li, hauv 1 T ntawm 4.2 K, tab sis Tc (pib) ntawm 8.5 K tau ntsuas rau ob leeg solders.Qhov kev ua tau zoo tshaj plaws tau tshaj tawm yog Jc ntawm Pb44.5Bi55.5. Lub Ic ntawm ib qho ntawm cov pob qij txha zoo tshaj plaws ua nrog Pb44.5Bi55.5 yog 136 A hauv 1.65 T ntawm 4.2 K. Cov txiaj ntsig ntawm kev ntsuas sib nqus tau ua raws li qhov kev ua tau zoo ntawm cov pob qij txha tsim nrog Pb42Bi58 piv rau Pb44.5Bi55. 5. Tsis tas li ntawd, peb tau sau tseg tias kev ua tiav kev sib koom ua haujlwm siab tsis txaus siab los ntawm xoob Cu hlau khi hauv qhov sib koom ua ke. Qhov kev sib koom ua ke tau tsim nrog ib zaug tig Nb-Ti kaw-voj kauj kom qhov kev ntsuas qhov kev puas tsuaj tuaj yeem siv los xam cov kev sib koom ua ke raws nraim. Kev ntsuas tag nrho cov kev tiv thaiv hluav taws xob, uas ua raws li cov kev qhia tshwj xeeb rau kev ua haujlwm tsis tu ncua, yog 3. los qhia kev ua haujlwm tsis tu ncua. Kev txhim kho ntawm kev ua haujlwm siab Nb-Ti superconducting pob qij txha yuav ua tau los ntawm kev tshawb nrhiav thiab kev tshawb pom ntawm Niobium-titanium Superconducting Joints txheej txheem qhia hauv daim ntawv no.

 

 

 

 

Cim npe nrov: Niobium-titanium Superconducting Joints, lwm tus neeg, manufacturers, hoobkas, customized, yuav, nqe, hais, zoo, cia muag, hauv Tshuag