Precious Hlau Nb nrog cov khoom zoo heev
Kev piav qhia
Niobium, feem ntau hu ua Nb, yog cov hlau muaj txiaj ntsig uas tau siv dav hauv ntau yam xws li kev kho mob, aerospace, thiab kev lag luam nuclear.Nws yog ib qho zoo heev cov khoom siv hluav taws xob kub, uas yog tsev neeg ntawm cov hlau refractory.
Ib daim ntawv ntawm niobium uas feem ntau siv yog niobium hmoov, uas yog tsim los ntawm kev txo niobium oxide nyob rau hauv lub qhov cub kub.Lub resulting hmoov yog nplua, greyish-dub hmoov nrog siab purity theem, ua rau nws haum rau ntau yam kev siv.
Niobium hmoov muaj ntau yam khoom siv, xws li lub zog siab, zoo ductility, thiab zoo heev corrosion kuj.Nws yog feem ntau siv rau hauv cov hmoov metallurgy daim ntaub ntawv, xws li cov khoom ntawm superalloys, vim nws qhov siab melting point thiab muaj peev xwm tiv taus kub thiab hnyav ib puag ncig.
Hauv kev kho mob, niobium hmoov yog siv los tsim cov kev kho mob cog thiab cov khoom siv vim nws cov biocompatibility thiab non-toxicity.Nws kuj tseem siv rau hauv kev tsim cov MRI scanners vim nws qhov tsis tshua muaj hlau nplaum.
Hauv kev lag luam aerospace, niobium hmoov yog siv los tsim cov cav kub kub, xws li foob pob hluav taws nozzles thiab cov ntaub thaiv cua sov, vim nws qhov zoo tshaj plaws lub zog-rau-qhov hnyav piv thiab muaj peev xwm tiv taus qhov kub thiab txias ib puag ncig.
Hauv kev lag luam nuclear, niobium hmoov yog siv rau hauv kev tsim cov roj rods thiab reactor Cheebtsam vim nws muaj peev xwm tiv taus kub thiab corrosive ib puag ncig.
Zuag qhia tag nrho, niobium hmoov yog ntau yam khoom siv thiab muaj txiaj ntsig uas muaj cov khoom tshwj xeeb thiab tuaj yeem siv rau ntau yam kev siv.
Chemistry
| Element | Nb | O | |
|---|---|---|---|
| Loj (%) | Purity ≥99.9 | ≤0.2 | |
Lub cev muaj zog
| PSD | Tus nqi ntws (sec / 50g) | Qhov ntom ntom (g / cm3) | Sphericity | |
|---|---|---|---|---|
| 45-105 hli | ≤ 15s / 50g | ≥4.5g / cm3 | ≥90% | |
