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    • Afnio - Foglio

      Discovered in 1923 by D. Coster and G.C. von Hevesey in Copenhagen, Denmark. Hafnium is a silvery coloured, 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 recrystallisation 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 zirconium metal which is used for nuclear engineering.Foglio - Sottili fogli di metallo puro e leghe metalliche. A causa della loro fragilità, alcuni fogli sono rivestiti su un lato con un sostegno in acrilico o poliestere. La parte in cui i fogli sono sostenuti è indicata nella descrizione dettagliata dell'elemento.

    18 risultati

    Prodotto
    Prodotto HF00-FL-000190 Afnio - Foglio Thickness 0.003mm --- Size 25mm x 25mm Purity 97.0%
    Prodotto HF00-FL-000100 Afnio - Foglio Thickness 0.004mm --- Size 25mm x 25mm - 50mm x 50mm Purity 97.0%
    Prodotto HF00-FL-000110 Afnio - Foglio Thickness 0.005mm - Diametro 4mm - 15mm Size Light Tight 25mm x 25mm Size 25mm x 25mm - 50mm x 50mm Purity 97.0%
    Prodotto HF00-FL-000120 Afnio - Foglio Thickness 0.006mm - Diametro 4mm - 15mm - Size 25mm x 25mm - 50mm x 50mm Purity 97.0%
    Prodotto HF00-FL-000130 Afnio - Foglio Thickness 0.007mm - Diametro 4mm - 15mm - Size 25mm x 25mm - 50mm x 50mm Purity 97.0%
    Prodotto HF00-FL-000140 Afnio - Foglio Thickness 0.008mm - Diametro 4mm - 15mm - Size 25mm x 25mm - 50mm x 50mm Purity 97.0%
    Prodotto HF00-FL-000150 Afnio - Foglio Thickness 0.009mm - Diametro 4mm - 25mm Size Light Tight 25mm x 25mm - 50mm x 50mm Size 100mm x 100mm Purity 97.0%
    Prodotto HF00-FL-000160 Afnio - Foglio Thickness 0.01mm - Diametro 4mm - 15mm Size Light Tight 25mm x 25mm - 50mm x 50mm Size 100mm x 100mm - 150mm x 150mm Purity 97.0%
    Prodotto HF00-FL-000170 Afnio - Foglio Thickness 0.0125mm - Diametro 4mm - 15mm Size Light Tight 25mm x 25mm - 100mm x 100mm Size 100mm x 100mm Purity 97.0%
    Prodotto HF00-FL-000180 Afnio - Foglio Thickness 0.015mm - Diametro 4mm - 15mm Size Light Tight 25mm x 25mm - 100mm x 100mm - Purity 97.0%
    Prodotto HF00-FL-000290 Afnio - Foglio Thickness 0.02mm - Diametro 4mm - 15mm Size Light Tight 25mm x 25mm - 100mm x 100mm - Purity 97.0%
    Prodotto HF00-FL-000200 Afnio - Foglio Thickness 0.025mm Tempra Annealed Diametro 4mm - 25mm Size Light Tight 25mm x 25mm - 100mm x 100mm - Purity 97.0%
    Prodotto HF00-FL-000105 Afnio - Foglio Thickness 0.075mm Tempra Annealed Diametro 4mm - 25mm Size Light Tight 25mm x 25mm - 100mm x 100mm - Purity 97.0%
    Prodotto HF00-FL-000210 Afnio - Foglio Thickness 0.125mm Tempra Annealed Diametro 4mm - 25mm Size Light Tight 25mm x 25mm - 100mm x 100mm - Purity 97.0%
    Prodotto HF00-FL-000114 Afnio - Foglio Thickness 0.14mm Tempra Annealed Diametro 4mm - 15mm Size Light Tight 25mm x 25mm - 100mm x 100mm - Purity 97.0%
    Prodotto HF00-FL-000220 Afnio - Foglio Thickness 0.25mm Tempra Annealed Diametro 4mm - 15mm Size Light Tight 25mm x 25mm - 100mm x 100mm - Purity 97.0%
    Prodotto HF00-FL-000230 Afnio - Foglio Thickness 0.5mm Tempra Annealed Diametro 4mm - 15mm Size Light Tight 25mm x 25mm - 100mm x 100mm - Purity 97.0%
    Prodotto HF00-FL-000240 Afnio - Foglio Thickness 1mm Tempra Annealed - Size Light Tight 25mm x 25mm - 100mm x 100mm - Purity 97.0%
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