1,017,714,568 visitors served.
1,017,714,568 visitors served. |
|
 Dictionary/ thesaurus |  Medical dictionary |  Legal dictionary |  Financial dictionary |  Acronyms |  Idioms |  Encyclopedia |  Wikipedia encyclopedia | ? |
hafnium |
Also found in: Dictionary/thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia | 0.15 sec. |
hafniumSilvery, metallic element, atomic number 72, relative atomic mass 178.49. It occurs in nature in ores of zirconium, the properties of which it resembles. Hafnium absorbs neutrons better than most metals, so it is used in the control rods of nuclear reactors; it is also used for light-bulb filaments. It was named in 1923 by Dutch physicist Dirk Coster (1889-1950) and Hungarian chemist Georg von Hevesy after the city of Copenhagen, where the element was discovered. |
|
? Mentioned in | ? References in periodicals archive | |
|---|---|---|
The company replaced the usual silicon dioxide in the transistor gate dielectric with nitrided hafnium silicate (HfSiON), a high dielectric constant (high-k) material, and confirmed its performance. This process led to the quick discovery of the new amide-ether based hafnium catalysts; "Single-site, non-metallocene catalysts is a developing area and one that holds great promise for polyolefins research and development. Hafnium and tungsten have distinctive locations in early Earth, says Thorsten Kleine of the University of Munster in Germany. |
 |
| Free Tools: |
For surfers:
Browser extension |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|
|---|
Disclaimer |
Privacy policy |
Feedback | Copyright © 2008 Farlex, Inc.
Printer friendly
Cite / link
Email
Feedback
hafnium