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hafnium    音标拼音: [h'æfniəm]
n. 铪

铪

hafnium
n 1: a grey tetravalent metallic element that resembles
zirconium chemically and is found in zirconium minerals;
used in filaments for its ready emission of electrons [synonym:
{hafnium}, {Hf}, {atomic number 72}]

hafnium \haf"ni*um\ (h[a^]f"n[=e]*[u^]m or h[aum]f"n[=e]*[u^]m),
n.
A metallic element of atomic number 72 present together with
zirconium to the extent of 1% to 5% in zirconium minerals. It
is a poisonous, ductile metal with a brilliant silver luster,
has an atomic weight of 178.49, and has a high melting point
(2227[deg] C). It is used in nuclear reactors, and
incandescent lamps as a scavenger of oxygen and nitrogen. See
also {norium}.
[1913 Webster]

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  • Hafnium - Wikipedia
    A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals Its existence was predicted by Dmitri Mendeleev in 1869, though it was not identified until 1922, by Dirk Coster and George de Hevesy
  • Hafnium | Definition, Atomic Mass, Properties, Uses, Facts | Britannica
    Hafnium, chemical element, metal of Group 4 (IVb) of the periodic table It is a ductile metal with a brilliant silvery luster It is dispersed in Earth’s crust to the extent of three parts per million and is invariably found in zirconium minerals up to a few percent compared with zirconium
  • The Hardworking Element Hafnium - ChemTalk
    In this article, you will learn several properties, applications, compounds, and current research on the element hafnium
  • Hafnium - Element information, properties and uses | Periodic Table
    Element Hafnium (Hf), Group 4, Atomic Number 72, d-block, Mass 178 486 Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images
  • Hafnium Facts - Hf or Atomic Number 72 - Science Notes and Projects
    Hafnium (symbol: Hf, atomic number: 72) is a transition metal that is similar in many ways to zirconium You probably do not encounter this element much, aside from its occurrence in some gemstones and integrated circuits
  • What Is Hafnium Used For? From Chips to Reactors
    Hafnium is a dense, heat-resistant metal used primarily in semiconductor chips, nuclear reactor control rods, jet engine components, and plasma cutting torches
  • 8 Common Uses of Hafnium – Zirconium Metal
    Hafnium is a versatile transition metal with exceptional properties, such as high melting point, corrosion resistance, and excellent neutron absorption capabilities, finding applications ranging from nuclear energy to aerospace engineering and beyond
  • Hafnium Facts, Symbol, Discovery, Properties, Uses
    Hafnium (pronounced as HAF-nee-uhm) belongs to the family of transition metals, denoted by the chemical symbol Hf It has thirty-two isotopes with known half-lives, of which only six exist naturally [1, 2]
  • Hafnium: Strategic Core Metal for High-End Manufacturing
    A s a niche yet high-strategic rare metal, hafnium (Hf, atomic number 72) lags behind common metals like copper in public awareness, but its unique physicochemical properties make it irreplaceable for nuclear power, aerospace, semiconductors and other high-end fields
  • Hafnium | Hf (Element) - PubChem
    Chemical element, Hafnium, information from authoritative sources Look up properties, history, uses, and more





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