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 founded 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 HfCAS#: 7440-58-6, m.p. 2227 °C, b.p. 4603 °C, Spec. Gravity 13.31gm/cm3Ductile, brilliant silver luster metal. |
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| Item No. | Description | Purity | Lot Size |
|---|---|---|---|
| ME72-2N75 | Hafnium electrolytic crystals | 99.75% | 5 kg 20 kg 100 kg |
| ME72-3N | Hafnium mettalic bars | 99.9% | 5 kg 20 kg 100 kg |
Hafnium Chloride HfCl4CAS#: 12055-23-1, UN3096, F.W. 320.3, m.p. 320 °CWhite powder. |
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| Item No. | Description | Purity | Lot Size |
|---|---|---|---|
| CL72-3N | Hafnium chloride fine powder | 99.9% Zr < 0.5% |
10 kg 50 kg 100 kg |
| CL72-3NH | Hafnium chloride fine powder | 99.9% Zr < 4.5% |
10 kg 50 kg 100 kg |
Hafnium Oxide HfO2CAS#: 12055-23-1, not hazardous, F.W. 210.49, m.p. 2774 °C, b.p. 5100~5400 °C, Spec. Gravity 9.68 gm/cm3White powder. |
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| Item No. | Description | Purity | Lot Size |
|---|---|---|---|
| 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 |
| 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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