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Nb ( Niobium )

Keterangan

     The name niobium was adopted officially in 1950 after years of controversy. The alternative name was columbium, and some metallurgists still use this name.   Niobium resists corrosion due to an oxide film. It can be attacked by hot, concentrated acids but resists attack by fused alkalis. It starts to oxidise in air at 200K, and when processed at even moderate temperatures must be placed in a protective atmosphere.

Nama lain (trademark, branding etc.)

Niobium, Niob, Niobij, Niob - r, Niobio, Ниобий, 

Spesifikasi Produk

Overview of Niobium
Atomic Number 41
Group 5
Period 5
Series Transition Metals
Relative Atomic Mass (12C=12.000)  92.906
Boiling Point 5017K 4744°C 8571°F
Melting Point 2741K 2468°C 4474°F
Density/kg m-3  8570 (293K)
Ground State Electron Configuration  [Kr]4d45s1
Electron Affinity(M-M-)/kJ mol-1  -109
Discoverer Known to ancient civilization
Discovery Location Unknown
Discovery Year 1801
Name Origin From Niobe; daughter of the mythical Greek king Tantalus.

Aplikasi

     It is used in stainless steel alloys for nuclear reactors, jets, missiles, cutting tools, pipelines, super magnets and welding rods.

Bahan Baku

Niobium, formerly columbium, is a chemical element with the symbol Nb (formerly Cb) and atomic number 41. It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main commercial source for niobium, and columbite.

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