Nanopowders of metals, alloys, nitrides, oxides, (nm)

Nanosize powders of metals Al, Ag, Fe, Cu, Fe, Sn, Ti, W, Zn, allows, oxides, nitrides, obtained by the method of electric explosion of a metal wire in a gas medium, and intended for use in electronics, power engineering, chemistry, biology, medicine. Supply of nanopowders is carried out in glass, metal jars. Weight range: 25g-100g-500g-1kg

Metals and alloys

  • Aluminum (Al)
  • Brass (Cu-Zn)
  • Copper (Cu)
  • Iron (Fe)
  • Nickel (Ni)
  • Silver (Ag)
  • Tin (Sn)
  • Titanium (Ti)
  • Tungsten (W)
  • Zinc (Zn)

Oxides

  • Aluminum oxide (Al2O3)
  • Copper oxide (CuO)
  • Iron oxide (Fe3O4)

Nitrides

  • Aluminum nitride (AlN)
  • Method of production and powder features

    Technological scheme for the production of metallic nanopowders by the electric explosion of conductors

    • Wire preparation (cleaning, annealing)
    • Winding the wire into the feed coils
    • Preparation of the installation (loading of wires, vaccination, filling with inert gas)
    • Dispersing the wire, obtaining a powder
    • Extraction of the powder in an inert atmosphere
    • Packaging of the finished powder

    Features of the process of production by the method of electric explosion are high temperatures and rates of formation of powder particles. The nanopowder obtained under such conditions possesses a number of unique properties

    • High chemical activity
    • Relatively uniform particle size
    • Relative stability of the powder under normal conditions
    • For sintering nanoparticles a lower temperature is required
    • The presence of excess energy
  • Application of nanopowders in combustion processes

    The greatest effect of using nanopowders in technological processes is achieved by taking into account the unique structural and dimensional parameters of particles obtained as a result of an electric explosion.

    The thermal properties of micro- and nanopowder aluminum differ significantly

    • The beginning of the exothermic process (combustion)
      20 mcm Al powder: from 1000 C°
      nanopowder Al: from 660 C°
    • Delay in ignition
      3 mcm Al powder: from 600 microseconds
      Al nanopowder: from 3 microseconds
    • When adding nanopowder to explosives, detonation velocity and brisance increase significantly.
    • To protect against the spontaneous reaction of nanopowders with other components of pyrotechnic compositions, microencapsulation of aluminum particles with a layer of palmitic acid is used.
  • Application of nanopowders as additives to lubricants

    When nanopowders of copper, zinc, and brass are introduced into the lubricant, a layer of nanoparticles is formed on the surface of the rubbing parts, which leads to an improvement in anti-wear and antifriction properties.

    The use of nanopowders as catalysts

    • catalysts based on nanopowders Zn, Ni, Pt allow to increase selectivity of formation of aromatic hydrocarbons by 2 times.
    • modification of polymer adhesives with nanoparticles
    • the introduction of nanowires into polymeric adhesives makes it possible to obtain hardening of the adhesive joint, to increase the peeling resistance up to 30%. Practice has shown that the effectiveness of nanopowder application directly depends on the degree of de-agglomeration of nanofibers.
  • Application of aluminum nanopowder for hydrogen production

    When interacting with water of one kilogram of electric explosive aluminum nanopowder, 1244.5 liters of hydrogen are released, which when burned gives 13.43 MJ of heat