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Hf
Hafnium
Atomic no.:
72
Atom. weight: 178.49
Density: 13.31
Class:
refractory metal
Melting point: 2227°C
Boiling point: 4602°C
Colour: Array
   
Discoverer: Dirk Coster and György K. von Hevesy
Place: Copenhagen, Denmark
Year: 1923

Discovered in 1923 by D. Coster and G.C. von Hevesey in Copenhagen, Denmark. Hafnium is a silvery colored, ductile metal which is found in all minerals containing zirconium. The chemistries of the two metals are similar which makes them difficult to separate, and the properties of each are greatly affected by the presence of the other as an impurity. Both zirconium and hafnium are extracted as the pure metal by reducing the tetrahalide with magnesium, the whole process being carried out under argon as both metals readily combine with other gases (e.g. nitrogen). The abundance of hafnium in the earth's crust is 5.3 ppm. Hafnium will resist corrosion in air due to the formation of an oxide film, although powdered hafnium will burn in air. It is unaffected by alkalis and acids, with the exception of HF. Hafnium can be used to control recrystallization of tungsten filaments but its main application is as control rod material in nuclear reactors due to its ability to absorb neutrons. The ability of hafnium to absorb neutrons means that it can sometimes be an annoying impurity in zironium metal which is used for nuclear engineering.

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 Mini-Hafnium Crystal Bar - 37.0g very shiny and clear!  Art. Nr. 005009  
Mini-Hafnium Crystal Bar - 37.0g very shiny and clear!
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Superb Hafnium Crystal Bar - 37.0g

This rare and small Hafnium Crystal Bar was created by a power outage at the manufacturer, so the procedure had to be stopped and it resulted in beautiful miniature Crystal Bars with stunning diamond-shining crystals on the surface

This hafnium is very pure, >99,9% with a Zirconium content ~ 1%!

Amount: 37.0g
Purity : 99.9%
Packing: PE-bag
101.00
- tax free

Availability: 1 in stock

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 High purity hafnium metal rod >42mm length - 11.5mm diameter  Art. Nr. 001343  
High purity hafnium metal rod >42mm length - 11.5mm diameter
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High purity Hafnium rod >99,9% - Zr <1%

Diameter 11.5mm - Length ~ 42mm. This high purity hafnium rod meets highest industrial standards and are best choice for elements collectors as well as for use in industry, jewellery, arts and crafts etc.

Amount: 57.4g
Purity : >99.9%
Packing: PE-bag
302.00
- tax free

Availability: 4 in stock

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 Acrylic Element cube - Hafnium Hf - 50mm  Art. Nr. 003075  
Acrylic Element cube - Hafnium Hf - 50mm
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The Sensation! Acrylic Element-blocks NEW!

Hafnium Hf - big shiny Hafnium metal turning


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Amount: 1 St.
Purity : 99.9%
Packing: PE bag
60.00
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Availability: 2 in stock

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 200 grams pure Hafnium metal melted pellets, purity 99.9%  Art. Nr. 004677  
200 grams pure Hafnium metal melted pellets, purity 99.9%
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200 grams vacuum melted ultra pure Hafnium metal beads

Zr content: 0.91%

clean & shiny pieces in high quality argon flooded taper joint glass bottle to prevent oxidation of this metal.

Size of the bottle: H = 85mm x D = 41mm
The bottle will be shipped in vacuum sealed foil.

Amount: 200g
Purity : 99.9%
Packing: PE - bag
898.00
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Availability: 3 in stock

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 Hafnium diboride HfB2 5 grams - 99.5%  Art. Nr. 001542  
Hafnium diboride HfB2   5 grams - 99.5%
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Hafnium boride - Hafnium diboride HfB2

Melting point: ~3250°C - A light grey metallic powder, chemically attacked very little by cold HCl, more rapidly by HNO3, and is dissolved by aqua regia. It reacts with H2SO4 and is readily attacked by fused alkali hydroxides, carbonates and disulfides. Produced by various processes.

Useful in nuclear applications because of the presence of Boron-10. Other applications include use of its relatively high conductivity, especially for a ceramic.

Amount: 5g
Purity : ~99.5%
Packing: glass bottle
25.00
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Availability: 3 in stock

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 Pure Hafnium Metal Plate 205x100 x 1mm - 99.9% purity - 280g  Art. Nr. 004269  
Pure Hafnium Metal Plate 205x100 x 1mm - 99.9% purity - 280g
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Pure Hafnium Metal Plate 205x100 x 1mm - 99.9% purity weight ~ 280g

For Laboratory, high temperature applications etc.

Amount: 1 St. /1 pc.
Purity : >99.9%
Packing: PE-bag
603.00
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Availability: 4 in stock

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 High purity Hafnium disc Ø 1 inch x 1mm - 99.9% purity  Art. Nr. 001730  
High purity Hafnium disc Ø 1 inch x 1mm - 99.9% purity
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High purity Hafnium disc  Ø1" (25mm) x 1mm - >99.9% purity - 6.94 grams

For Laboratory, high temperature applications etc.

Different sizes available (see zoom picture)

Amount: 1 St. /1 pc.
Purity : >99.9%
Packing: PE-bag
23.00
- tax free
5-9 pcs.: 22.00 Euro
>9 pcs.: 21.00 Euro
Availability: 70 in stock

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 4 pc. Hafnium discs Ø 1/2 inch x 1mm - 99.9% purity  Art. Nr. 001734  
4 pc. Hafnium discs Ø 1/2 inch x 1mm - 99.9% purity
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4 pcs. high purity Hafnium discs  Ø1/2" (12.7mm) x 1mm - >99.9% purity- weight ~ 1.7g

For Laboratory, high temperature applications etc.

We offer discounts for larger quantities. Please send a request!

Different sizes available (see zoom picture)

Amount: 4 St. / 4 pcs.
Purity : >99.9%
Packing: PE-bag
24.00
- tax free
5-9 pcs.: 23.00 Euro
>9 pcs.: 22.00 Euro
Availability: 84 in stock

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