Hafnium

Hafnium is a chemical element with the symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in zirconium minerals. Hafnium was found by Dirk Coster and Georg von Hevesy in 1923 in Copenhagen, Denmark, and named Hafnia after the Latin name for "Copenhagen".

Hafnium is used in filaments, electrodes, and some semiconductor fabrication processes for integrated circuits at 45 nm and smaller feature lengths. Its large neutron capture cross-section makes hafnium a good material for neutron absorption in control rods in nuclear power plants. Some superalloys used for special applications contain hafnium in combination with niobium, titanium, or tungsten.

Hafnium Metal Hafnium Chloride Hafnium Oxide

Hafnium Metal:

Hafnium MetalHf

CAS#: 7440-58-6, m.p. 2227 °C, b.p. 4603 °C, Spec. Gravity 13.31gm/cm3
Ductile, brilliant silver luster metal.
Item No. Description Purity Lot Size US$
ME72-2N75 Hafnium electrolytic crystals 99.75% 5 kg
20 kg
100 kg
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ME72-3N Hafnium mettalic bars 99.9% 5 kg
20 kg
100 kg
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Hafnium Chloride:

Hafnium ChlorideHfCl4

CAS#: 12055-23-1, UN3096, F.W. 320.3, m.p. 320 °C
White powder.
Item No. Description Purity Lot Size US$
CL72-3N Hafnium chloride fine powder 99.9%
Zr < 0.5%
10 kg
50 kg
100 kg
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CL72-3NH Hafnium chloride fine powder 99.9%
Zr < 4.5%
10 kg
50 kg
100 kg
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Hafnium Oxide:

Hafnium OxideHfO2

CAS#: 12055-23-1, not hazardous, F.W. 210.49, m.p. 2774 °C, b.p. 5100~5400 °C, Spec. Gravity 9.68 gm/cm3
White powder.
Item No. Description Purity Lot Size US$
OX72-3N Hafnium oxide fine powder
D50 < 1.0 µm
Surface area: > 8 -20 m2/g
99.9%
Zr < 0.5%
10 kg
50 kg
100 kg
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OX72-3NH Hafnium oxide fine powder
D50 < 1.0 µm
Surface area: > 8 -20 m2/g
99.9%
Zr < 4.5%
10 kg
50 kg
100 kg
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