Month: February 2018

Why is Zirconium a Transition Metal

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When of sufficient purity, zirconium is soft and ductile. It has good corrosion resistance and low absorption capacity for thermal neutrons. These properties are desirable in materials used for certain parts of nuclear reactors. The great increase in production of zirconium since 1945 has been the direct result of construction of nuclear reactors. Zirconium is […]

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What Hafnium is Used For

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Hafnium occurs in zirconium ores. Because this metal must be removed from “reactor grade” zirconium, the production of hafnium is largely dependent on zirconium production, as discussed later. Its melting point is 4032 F. However, it has not been available in sufficiently large quantities to have any extensive elevated-temperature applications other than in control rods […]

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Why Platinum is the Most Expensive Metal

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The platinum-group metals can be described as refractory metals because of their high melting points. This group comprises platinum, osmium, iridium, ruthenium, rhodium and palladium, i. e., metals which have properties similar to those of platinum. The metals in this group are quite scarce and, hence, can be considered only for very specialized applications even […]

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