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hafnium |
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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. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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To find a supernova, the new technique would have to search for one single atom of a certain isotope of hafnium on Earth, which would prove that a supernova once exploded near our solar system. 04 contains 15 electrical contact test methods, 29 specifications for precious metals, 101 specifications for nickel alloys, 19 specifications for zinc and cadmium, 16 specifications for molybdenum and tungsten, 12 titanium specifications, and 17 specifications for zirconium and hafnium. 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. |
hafnium |
Hafiz al- Assad Hafiz Assad Hafiz Ibrahim Hâfiz, Shams al-Din Muhammad Hafiz-i Abru Hafizabad Hafizabad District hafizes hafizes hafizes HAFK HAFL Haflinger Freunde Kreis Cuxhaven Haflinger horse Haflinger Registry of North America HAFM HAFMC Hafnarfjord Hafnarfjordhur Hafnarfjordur Hafnarfjördur Hafnarfjorour Hafnarfjörður HAFND hafner ware Hafnia Hafnia hafnium Hafnium carbideHafnium Silicide Hafnium(IV) carbide Hafnium(IV) oxide Hafnium(IV) oxide HAFO HAFOP HAFOS HAFP HAFRC Hafren Hafrsfjord HAFS Hafsa Hafsid Hafsid dynasty Hafsids Hafstein, Hannes haft haft haft Haft Seen Haftara Haftarah Haftaros Haftarot Haftaroth | ||||||||
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