The electrochemical method\u00a0for obtaining nanocrystalline tungsten bronzes with hexagonal structure in polytungsten melts has been developed. The parameters of electrolysis process providing\u00a0the obtainment of\u00a0 the needle nanocrystalline structures\u00a0for oxide tungsten bronzes with needles width less than 100nm have been established.<\/p>\n
\u00a0Two types of nanocrystalline needles \u2013 with a sharp tip and in the form of round rods \u2013 have been found for the first time.<\/p>\n
It is possible to produce\u00a0as nonoriented as oriented (where all nanocrystalline needles have orientation <0001>) deposits.<\/p>\n
Nanocrystalline coatings were deposited on metal substrates. Specifically, a W plate having the (100) texture was covered with a continuous layer of hexagonal bronze 10 mm thick in which each microcrystal had an oriented nanocrystalline structure.<\/p>\n
Nanocrystalline oxide tungsten bronzes possess such valuable properties as high corrosion resistance which depends on the bronze composition, different nature of electrical conductivity, selectivity to certain types of cations in aqueous solutions, a considerable range of color, and high catalytic activity.<\/p>\n
\u00a0The RF patent is received for this invention.<\/p>\n
Advantages:<\/strong><\/p>\n