Zirconium is obtained from the silicate ore, zircon, by reduction of the oxide, chloride, etc., or by electrolysis.
It is a silver-grey, malleable and ductile metal.
It is used in photo-flash bulbs, for the manufacture of getters or absorbents in radio valve manufacture, etc. Ferro-zirconium (Chapter 72) is used in steel manufacture, and the metal is also alloyed with nickel, etc.
Zirconium, alone or alloyed with tin ( zircalloy ), is also used in the manufacture of sheaths for nuclear fuel cartridges and of metal structures for nuclear plant. Zirconium-plutonium alloys and zirconium-uranium alloys are used as nuclear fuel. For nuclear purposes all but traces of hafnium must first be removed.
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