Preferenze
AziendaGoodfellow GmbH
LinguaItaliano
ValutaEUR
Consegna aGermania

Preferenze

EUR
    Totale:
     
     Prodotto/i  Articolo/i
    Accesso | Registrazione
    • Germanio - Polvere

      Discovered in 1886 by C.A. Winkler at Freiberg, Germany. Germanium is a silvery white brittle metalloid member of the carbon group of elements, its physical properties being similar to those of silicon, the element which precedes it in the group. Other elements within the carbon group are relatively common, but germanium is found only in trace amounts in some coals and as a minor component in some ores, the principle one being argyrodite, a double sulphide of silver and germanium (the mineral from which germanium was first isolated). It has an abundance within the Earth's crust of 1.8 ppm and the element is produced by reduction of the oxide, ultra-high purity material being obtained by zone refining (a process in which the element is formed into a rod which is then heated at one end to produce a narrow molten zone. The heater is moved along the length of the rod so that the molten zone travels from one end of the rod to the other. Impurities are more soluble in the molten metal than in the solid and thus concentrate in the liquid zone as it moves to one end of the rod). Germanium is stable in air and water and is unaffected by alkalis and acids, with the exception of nitric acid. It is a poor conductor of electricity but has exceptional properties as a semiconductor material and it is in this area where germanium is primarily used. However, other applications for the material include its use as an alloying element in the production of specific alloys and as an addition to glass in the manufacture of infrared devices.Polvere - Piccole particelle con un'intervallo di dimensioni definito. I materiali descritti come precursori delle leghe non sono leghe vere e proprie, ma sono ottenuti sinterizzando un mix di polveri dei metalli componenti per ottenere la lega per diffusione. La torta risultante è affinata e setacciata per ottenere l'intervallo delle dimensioni delle particelle richiesto. Se non diversamente specificato, le dimensioni della particella mostrata sono solo per guida. Non forniamo alcuna garanzia sulla distribuzione delle dimensioni delle particelle, tra le dimensioni minime e massime quotate o una forma delle particelle specifica.

    1 risultati

    Prodotto
    Prodotto GE00-PD-000111 Germanio - Polvere Dimensione massima delle particelle 150µm Peso 10g - 1000g Purity 99.999%
    Sorry – Your selected filters returned no results.

    Please try a different filter selection or choose from one of the following product types below:

    Sorry, but you need to update your browser to use our website.

    We apologise for any inconvenience this may cause and thanks for your patience.

    To place a phone order:
    US:1 800 821 2870
    UK: 0800 731 4653

    Customer Support: info@goodfellow.com

    Thank you
    The Goodfellow Team