from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A brilliant, silvery, metallic element separated from ores of zirconium and used in nuclear reactor control rods, as a getter for oxygen and nitrogen, and in the manufacture of tungsten filaments. Atomic number 72; atomic weight 178.49; melting point 2,220°C; boiling point 5,400°C; specific gravity 13.3; valence 4. See Table at element.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A metallic chemical element (symbol Hf) with an atomic number of 72.
from the GNU version of the Collaborative International Dictionary of English
- 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° C). It is used in nuclear reactors, and incandescent lamps as a scavenger of oxygen and nitrogen. See also norium.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
The name hafnium was given by its Danish discoverers, Coster and von Hevesey, and was created from the Latin name Hafnia which means Copenhagen, in honor of the capital city of Denmark.
Intel is building key portions of transistors in the chips from a material called hafnium instead of silicon dioxide, an industry mainstay since the 1960s.
And some of them have to do with my age, so that when I was 72, I got this metal, hafnium, which is element 72.
The new hafnium-infused circuitry – which reduces electrical current leakage in transistors – conserves even more energy, giving you more time away from the wall outlet.
Pascal Zachary writes, Designers led by Mr. Bohr in Hillsboro, Ore., chose hafnium to replace silicon oxide, the venerable insulator in chips and a material used in making glass.
Not yesterday, or in George Bush's and every neocon's vicariously fulfilled hafnium wet-dream of glory, but TODAY, right this moment type of today: Why?
Allegheny Technologies Incorporated manufactures titanium, hafnium, tungsten, and cobalt.
The structure of the hafnium solid is especially effective at storing energy.
(Weinberger, who has written for DISCOVER, is a hafnium bomb sceptic and has since written a lively account of the controversy in her book Imaginary Weapons)
In the real world, hafnium is closely related to zirconium, and it has many of the same properties.
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