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niobium    音标拼音: [n,ɑɪ'obiəm]
n. 铌

铌

niobium
n 1: a soft grey ductile metallic element used in alloys; occurs
in niobite; formerly called columbium [synonym: {niobium},
{Nb}, {atomic number 41}]

Columbium \Co*lum"bi*um\, n. [NL., fr. Columbia America.]
(Chem.)
A rare element of the vanadium group, first found in a
variety of the mineral columbite occurring in Connecticut,
probably at Haddam. Atomic weight 94.2. Symbol Cb or Nb. Now
more commonly called {niobium}.
[1913 Webster]


niobium \ni*o"bi*um\, n. [NL., fr. L. & E. {Niobe}.] (Chem.)
The chemical element of atomic number 41. Chemical symbol Nb.
Atomic weight 92.91. Previously called {columbium}. See also
{Columbium}.
[1913 Webster]

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  • Niobium - Wikipedia
    Niobium is a chemical element; it has symbol Nb (formerly columbium, Cb) and atomic number 41 It is a light grey, crystalline transition metal Pure niobium has a Mohs hardness rating similar to pure titanium, [8] and it has similar ductility to iron
  • Niobium | Properties, Uses, History of the Chemical Element - Britannica
    Niobium, chemical element, refractory metal of Group 5 (Vb) of the periodic table, used in alloys, tools and dies, and superconductive magnets Niobium is closely associated with tantalum in ores and in properties
  • Niobium - Element information, properties and uses | Periodic Table
    The main source of this element is the mineral columbite This mineral also contains tantalum and the two elements are mined together Columbite is found in Canada, Brazil, Australia, Nigeria and elsewhere Some niobium is also produced as a by-product of tin extraction
  • Niobium Facts, Symbol, Discovery, Properties, Uses
    Niobium (pronounced as ni-OH-bee-um) belongs to the family of transition metals, denoted by the chemical symbol Nb Defined as a soft and ductile metal with eighteen isotopes, it is available in the form of foil, sheet, tube, rod, and powder
  • What is Niobium? - Vital Metals
    What is Niobium? Niobium (Nb) is a ductile refractory metal that is highly resistant to heat and wear It is resistant to corrosion owing to the formation of a surface oxide layer Approximately 90% of niobium use is attributed to the steel industry, predominantly as a micro alloy with iron
  • Niobium Element Facts - chemicool. com
    In 1846 German chemist Henrich Rose independently discovered the element and named it niobium The metal was first isolated by Swedish scientist Christian Blomstrand in 1864 He reduced the chloride by heating it in a hydrogen atmosphere The name niobium was adopted internationally in 1950
  • Facts About Niobium - Live Science
    Properties, sources and uses of the element niobium, and facts about its unusual history
  • Niobium: Properties, Uses, and Applications in Industry and Medicine
    Explore the comprehensive guide on niobium, a versatile transition metal with unique properties Learn about its history, physical and chemical characteristics, and its vast applications in industries like aerospace and healthcare
  • Niobium, Chemical Element - uses, elements, metal, number, name, symbol . . .
    Niobium is a shiny gray metal with a melting point of 2,468°C (4,474°F) and a boiling point of 4,927°C (8,901°F) Its density is 8 57 grams per cubic centimeter
  • Periodic Table of Elements: Los Alamos National Laboratory
    Niobium is a shiny, white, soft, and ductile metal, and takes on a bluish cast when exposed to air at room temperatures for a long time The metal starts to oxidize in air at 200°C, and when processed at even moderate temperatures must be placed in a protective atmosphere





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