Niobium is classified as a transition metal on the Periodic Table of Elements. It is often found in nature with tantalum; hence it mimics many of its properties. It has a melting point of 2,468°C, a density of 8.57 g/cc, and a vapor pressure of 10-4 Torr at 2,287°C. While typically metallic gray in color, it is known to take on a bluish tinge when exposed to air. It is used in various superconducting alloys and is a common element in jewelry production. Niobium and its compounds and alloys are evaporated under vacuum to make semiconductor, optical and wear resistant coatings.
Material Type | Niobium |
Symbol | Nb |
Atomic Weight | 92.90638 |
Atomic Number | 41 |
Color/Appearance | Gray, Metallic |
Thermal Conductivity | 54 W/m.K |
Melting Point (°C) | 2,468 |
Coefficient of Thermal Expansion | 7.3 x 10-6/K |
Theoretical Density (g/cc) | 8.57 |
Z Ratio | 0.492 |
Sputter | DC |
Max Power Density (Watts/Square Inch) | 100* |
Type of Bond | Indium, Elastomer |
Comments | Attacks W source. |
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