Magnesium diboride yog ib qho ionic compound, nrog hexagonal siv lead ua qauv. Magnesium diboride ntawm qhov kub thiab txias me ntsis 40K (sib npaug rau -233 ℃) yuav hloov mus rau hauv superconductor. Thiab nws qhov tseeb ua haujlwm kub yog 20 ~ 30K. Txhawm rau kom ncav cuag qhov ntsuas kub no, peb tuaj yeem siv cov kua neon, kua hydrogen lossis kaw lub voj voog lub tub yees kom ua tiav qhov txias. Piv rau kev lag luam tam sim no siv cov kua helium kom txias cov niobium alloy (4K), cov txheej txheem no yooj yim dua thiab pheej yig dua. Thaum nws yog doped nrog carbon los yog lwm yam impurities, magnesium diboride nyob rau hauv ib tug sib nqus teb, los yog muaj ib tug tam sim no dhau mus, lub peev xwm los tuav lub superconducting yog ntau npaum li niobium alloys, los yog txawm zoo dua.
| Fe | Mn | Cu | Ca | Ni | Zn | Pb | Sn |
| 48ppm ua | 0,1ppm ua | 0.06ppm ua | 0.04ppm ua | 7, 4 ppm | 0, 2 ppm | 0, 14 ppm | 0,4ppm ua |
Kev pabcuam peb tuaj yeem muab tau
1) Daim ntawv cog lus raug cai tuaj yeem kos npe
2) Daim ntawv cog lus tsis pub lwm tus paub tuaj yeem kos npe
3) Xya hnub rov qab lav
Tseem ceeb tshaj: peb tuaj yeem muab tsis tau tsuas yog cov khoom lag luam, tab sis kev pabcuam kev daws teeb meem!
Peb yog cov chaw tsim khoom, peb lub Hoobkas nyob hauv Shandong, tab sis peb kuj tuaj yeem muab kev pabcuam nres ib qho rau koj!
T / T (tex hloov pauv), Western Union, MoneyGram, BTC (bitcoin), thiab lwm yam.
≤25kg: hauv peb hnub ua haujlwm tom qab tau txais cov nyiaj them poob haujlwm. 25kg: ib as
Muaj, peb tuaj yeem muab cov qauv dawb me me rau kev soj ntsuam zoo!
1kg ib lub hnab fpr kuaj, 25kg lossis 50kg ib nruas, lossis raws li koj xav tau.
Khaws lub thawv kaw kom nruj rau hauv qhov chaw qhuav, txias thiab zoo-ventilated.
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