Khoom
| Niobium | |
| Theem ntawm STP | khov kho |
| Melting taw tes | 2750 K (2477 ° C, 4491 ° F) |
| Kub taw tes | 5017 K (4744 ° C, 8571 ° F) |
| Ntom ntom ntom ntom (ze RT) | 8.57 g / cm3 |
| Tshav kub ntawm fusion | 30 KJ / MOL |
| Tshav kub ntawm vaporization | 689.9 KJ / Mol |
| Mev khuam pob muaj peev xwm ua kom sov | 24.60 J / (Molm K) |
| Kev tshwm sim | Grey Metallic, Bluish Thaum Oxidized |
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Niobium hmoov
Niobium hmoov (CASE NO. 7440-03-1) yog lub teeb grey nrog lub siab melting point thiab tiv thaiv corrosion. Nws yuav siv rau ntawm lub ntsej muag xiav thaum thaum raug huab cua ntawm chav dej kub rau ncua sijhawm. Niobium yog qhov tsawg, mos, malas tau, ductile, grey-dawb hlau. Nws muaj lub cev-nruab nrab ntawm nruab nrab Crystalline qauv thiab hauv nws lub cev thiab tshuaj lom neeg nws zoo li tantalum. Cov hlau txoj kev oxidation nyob rau hauv cov pa taws thaum 200 ° C. Niobium, thaum siv hauv kev tso cai, txhim kho lub zog. Nws cov khoom lag luam superconductive yog txhim kho thaum ua ke nrog zirconium. Niobium micron hmoov pom nws tus kheej nyob rau hauv ntau yam kev siv xws li cov khoom siv hluav taws xob xws li, thiab kev kho mob vim nws cov khoom siv hluav taws xob, thiab cov tshuab hluav taws xob, thiab cov tshuab hluav taws xob.