Zirconium

Zirconium is a silvery transition metal with atomic number 40. Its corrosion resistance and low absorption of neutrons make it useful in nuclear reactors and chemical equipment.

Zircaloy: Zircaloy is a family of zirconium alloys developed for nuclear fuel cladding. Its low neutron absorption and resistance to hot water make it a standard fuel-cladding material.
Atomic number: Atomic number is the number of protons in an atom’s nucleus and identifies the element. Forty protons define zirconium and determine its place among the elements.
Zircon: Zircon is a zirconium silicate mineral with the formula ZrSiO₄. The mineral gave zirconium its name and remains a major source of the element.
Hafnium: Hafnium is a transition metal with atomic number 72 and chemical properties closely resembling zirconium. Their near-identical chemistry complicates separation, but hafnium absorbs neutrons far more strongly.
Nuclear fuel cladding: Nuclear fuel cladding is the protective tube surrounding fuel pellets in a reactor. Zirconium alloys contain fission products while letting neutrons pass through efficiently.
Electron configuration: Electron configuration describes how electrons occupy atomic shells and subshells. Zirconium’s valence-electron arrangement helps explain its metallic bonding and chemical reactivity.
Martin Heinrich Klaproth: Martin Heinrich Klaproth was a German chemist who identified several elements in the late eighteenth century. Klaproth recognized zirconium as a distinct element in 1789 while analyzing zircon.
Titanium: Titanium is a corrosion-resistant transition metal with atomic number 22, valued for strength and low density. Titanium is lighter and stronger for many structures, while zirconium performs better in some reactor environments.
Nuclear reactor: A nuclear reactor sustains controlled nuclear fission to produce heat or neutron radiation. Reactor designs exploit zirconium’s ability to withstand coolant while absorbing few neutrons.
Passivation: Passivation is the formation of a thin surface layer that slows further corrosion. A stable zirconium oxide film protects the metal in many corrosive environments.

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