Definitions for hafniumˈhæf ni əm, ˈhɑf-

This page provides all possible meanings and translations of the word hafnium

Princeton's WordNetRate this definition:(0.00 / 0 votes)

  1. hafnium, Hf, atomic number 72(noun)

    a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons

WiktionaryRate this definition:(0.00 / 0 votes)

  1. hafnium(Noun)

    a metallic chemical element (symbol Hf) with an atomic number of 72.

  2. Origin: Hafnia, Copenhagen

FreebaseRate this definition:(0.00 / 0 votes)

  1. Hafnium

    Hafnium is a chemical element with the symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in zirconium minerals. Its existence was predicted by Dmitri Mendeleev in 1869. Hafnium was the penultimate stable isotope element to be discovered. Hafnium is named after Hafnia, the Latin name for "Copenhagen", where it was discovered. Hafnium is used in filaments and electrodes. Some semiconductor fabrication processes use its oxide for integrated circuits at 45 nm and smaller feature lengths. Some superalloys used for special applications contain hafnium in combination with niobium, titanium, or tungsten. Hafnium's large neutron capture cross-section makes it a good material for neutron absorption in control rods in nuclear power plants, but at the same time requires that it be removed from the neutron-transparent corrosion-resistant zirconium alloys used in nuclear reactors.

U.S. National Library of MedicineRate this definition:(0.00 / 0 votes)

  1. Hafnium

    Hafnium. A metal element of atomic number 72 and atomic weight 178.49, symbol Hf. (From Dorland, 28th ed)


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