- Hafnium is a chemical
element that has the symbol Hf and atomic number 72. A lustrous, silvery
gray tetravalent transition metal, hafnium resembles zirconium
chemically and it is found in zirconium minerals.
- Hafnium is used in
tungsten alloys in filaments and electrodes, in integrated circuits as a
gate insulator for transistors, and as a neutron absorber in control
rods in nuclear power plants.
- Hafnium is estimated to
make up about 0.00058% of the Earth's upper crust by weight. It is found
combined in natural zirconium compounds but it does not exist as a free
element in nature.
- Minerals that contain
zirconium, such as alvite [(Hf, Th, Zr)SiO4 H2O], thortveitite, and
zircon (ZrSiO4), usually contain between 1 and 5% hafnium.
- Hafnium and zirconium
have nearly identical chemistry, which makes the two difficult to
separate.
About half of all hafnium metal manufactured is produced
as a by-product of zirconium refinement.
- This is done through
reducing hafnium chloride with magnesium or sodium in the Kroll
process.
- Hafnium is found in
various alloyed and unalloyed forms such as plate, strip, sheet, rod,
wire and tube – similar to zirconium metal.
- Hafnium is used to make
control rods for nuclear reactors because of its ability to absorb
neutrons , excellent mechanical properties and exceptional
corrosion-resistance properties.
- Hafnium is used in
gas-filled and incandescent lamps, for scavenging oxygen and
nitrogen.
- A hafnium-based
compound is employed in gate insulators in the 45 nm generation of
integrated circuits from Intel, IBM and others.
- Hafnium oxide-based
compounds are practical high-k dielectrics, allowing reduction of the
gate leakage current which improves performance at such scales.
- DARPA has been
intermittently funding programs in the US to determine the possibility
of using a nuclear isomer of hafnium to construct small, high yield
weapons with simple x-ray triggering mechanisms—an application of
induced gamma emission.
- Small additions of
hafnium increase the adherence of protective oxide scales on nickel
based alloys.
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General
Information
- Information about Hafnium
- Hafnium Fact Sheet
- Description about Hafnium
- Periodic table of Hafnium
- eHafnium.com
Company
Profile
Company from
China
Company from
NewJersey
Company from USA
Consultant
- Consultant from Denmark
- Consultant from Lasvegas
- Consultant from Mexico
- Consultant from Missouri
- Consultant from UnitedKingdom
Suppliers
- Selling leads of
Hafnium
- Tradeleads of
Hafnium
- Hafnium
suppliers
- Hafnium
Manufacturers
Products
- Hafnium
TetraChloride
- Hafnium Ingot
- Hafnium oxide
- Hafnium powder
Patent
- Zirconium and hafnium
separation in chloride solutions using continuous ion exchange
chromatography
- Thin Hafnium oxide film
and method for depositing same
- Thin layer of hafnium
oxide and deposit process
- Zirconium and hafnium
separation in sulfate solutions using continuous ion exchange
chromatography
Production
- Domestic survey data of Hafnium in 2000
- Domestic survey data of Hafnium in 2001
- Domestic survey data of Hafnium in 2002
- Domestic survey data of Hafnium in 2003
- Domestic survey data of Hafnium in 2005
- Domestic survey data of Hafnium in 2006
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MSDS
Hafnium Oxide
Hafnium Silicide
Hafnium Standard
Solution
Tetrakis(dimethylamino)hafnium
Hafnium 1000 ppm A/S standard
Process &
Properties
- Extraction of
short-lived zirconium and hafnium isotopes using crown ethers
-
Atomic Layer Deposition of Hafnium
Silicate Thin Films Using HfCl2[N(SiMe3)2.]2 and H2O
- Equation of state of cubic hafnium(IV) nitride
having Th3P4-type structure
-
Hydrogen Concentration Dependence of
Mechanical Properties and Electronic Structures for Hafnium Hydrides and
Deuterides
- Hafnium oxide composition
-
Tensile and Stress-Rupture Behavior of
Hafnium Carbide Dispersed Molybdenum and Tungsten Base Alloy
Wires
- Thermal behavior of hafnium-based ultrathin
films on silicon
- Thin Hafnium oxide thickness, composition and
uniformity measurements by XPS
Commodity
Profile
- Domestic Production and Use of Hafnium in
2000
- Domestic Production and Use of Hafnium in
2001
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Domestic Production and Use of Hafnium
in 2002
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Domestic Production and Use of Hafnium
in 2003
-
Domestic Production and Use of Hafnium
in 2004
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Domestic Production and Use of Hafnium
in 2005
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Domestic Production and Use of Hafnium
in 2006
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Domestic Production and Use of Hafnium
in 2007
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Domestic Production and Use of Hafnium
in 2008
Market &
Report
- Hafnium Market
- Corrosion of Hafnium and Hafnium Alloys
- High hafnium zircon from Norway
- Electronic structure of hafnium
-
Hafnium Report
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