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Hafnium , Hf
Hafnium is a chemical element that has the symbol Hf and atomic number 72. Described as a lustrous, silvery grey transition metal, it is capable of forming compounds with a tetravalent state. This property allows it to participate in diverse chemical reactions, lending versatility to its applications. Hafnium's properties and applications stem from its close relationship with zirconium, as they are often found together in minerals. Hafnium shares similar chemical characteristics with zirconium, making it valuable for various industrial applications.
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Custom EnquiryHf Rod 1.58mm diameter 99.9% pure
Hafnium
Hf Rod 3.18mm diameter 99.9% pure
Hafnium
Hf Rod 6.35mm diameter 99.9% pure
Hafnium
Hf Rod 12.7mm diameter 99.9% pure
Hafnium
Hf Rod 15.88mm diameter 99.9% pure
Hafnium
Hf Rod 19.05mm diameter 99.9% pure
Hafnium
Hf Rod 25.4mm diameter 99.9% pure
Hafnium
Hf Sheet Thickness 0.5mm (0.020")
Purity 99.9%, Hafnium
Hf Sheet Thickness 1.0mm (0.040")
Purity 99.9%, Hafnium
Hf Sheet Thickness 1.5mm (0.060")
Purity 99.9%, Hafnium
Hf Sheet Thickness 12.7mm (0.500")
Purity 99.9%, Hafnium
Hf Sheet Thickness 3.18m (0.125")
Purity 99.9%, Hafnium
Hf Sheet Thickness 6.3mm (0.250")
Purity 99.9%, Hafnium
Hafnium Hf,
Available purities 99.9%, 99.95% as standard, 99.99%+ possible
Hafnium Selenide HfSe2, Purity 99.9%
Hafnium carbide HfC, Purity 99.5%
Hafnium diboride HfB2, Purity 99.9%
Hafnium oxide HfO2,
Available purities 99.9% & 99.99%
Hafnium oxide-Yttrium oxide HfO2-Y2O3,
Available in various ratios wt% or at%, Purity 99.99%
Hafnium-Silicon oxide HfSiO4,
Purity 99.95%
Hafnium nitride HfN, Purity 99.5%
Hafnium-Zirconium-Titanium-Tantalum Hf-Zr-Ti-Ta,
Available in various ratios wt% or at%, Purity 99.5%
Hafnium-Zirconium-Titanium-Niobium Hf-Zr-Ti-Nb,
Available in various ratios wt% or at%, Purity 99.5%
Hafnium-Zirconium-Titanium-Vanadium Hf-Zr-Ti-V,
Available in various ratios wt% or at%, Purity 99.5%
Hafnium-Zirconium-Titanium-Tantalum-Vanadium Hf-Zr-Ti-Ta-V,
Available in various ratios wt% or at%, Purity 99.5%
Hafnium-Zirconium-Titanium-Tantalum-Niobium-Vanadium Hf-Zr-Ti-Ta-Nb-V,
Available in various ratios wt% or at%, Purity 99.5%
Hafnium oxide-Zirconium oxide HfO2-ZrO2,
Available in various ratios wt% or at%, Purity 99.95% & 99.99%
Hafnium oxide-Zirconium oxide HfO2 - ZrO2, Available in various ratios wt% or at%, Purity 99.95% & 99.99%
Hf Foil Thickness 0.1mm (0.004") Purity 99.9%
Hafnium
Hf Foil Thickness 0.2mm (0.008") Purity 99.9%
Hafnium
HfO2 TRG 50.8mm dia. x 3mm Tk 99.95% Pure
Hafnium Oxide
Hafnium is a shiny silvery, ductile metal that is corrosion resistant and chemically similar to zirconium. The physical properties of hafnium are markedly affected by zirconium impurities, and these two elements are among the most difficult ones to separate. A notable physical difference between them is their density (zirconium being about half as dense as hafnium), but chemically the elements are extremely similar.
The most notable physical property of hafnium is that it has a very high neutron-capture cross-section, and several isotopes of hafnium nuclei can absorb multiple neutrons. This makes hafnium a good material for use in the control rods for nuclear reactors. Its neutron-capture cross-section is about 600 times that of zirconium. (Other elements that are good neutron-absorbers for control rods are cadmium and boron.)
Separation of hafnium and zirconium becomes very important in the nuclear power industry, since zirconium is a good fuel-rod cladding metal, with the desirable properties of a very low neutron capture cross-section, and a good chemical stability at high temperatures. However, because of hafnium's neutron-absorbing properties, hafnium impurities in zirconium would cause it to be far less useful for nuclear reactor materials applications. Thus a nearly-complete separation of zirconium and hafnium is necessary for their use in nuclear power.
Hafnium carbide is the most refractory binary compound known, with a melting point >3890 °C, and hafnium nitride is the most refractory of all known metal nitrides, with a melting point of 3310 °C. This has led to proposals that hafnium or its carbides might be useful as construction materials that are subjected to very high temperatures.