Procedure for the Synthesis of Threadlike Tungsten Oxide W5O14

The present invention relates to a procedure for the synthesis of threadlike tungsten oxide W5O14 in the presence of nickel at temperatures lower than 1000° C. The procedure enables the synthesis of electrically conductive tungsten oxides having rodlike or threadlike forms. The present invention relates to the field of chemical technology, more specifically, to inorganic chemistry, of tungsten oxides obtained in the form of nanostructures by means of physico-chemical processing.

Represented is a procedure for the synthesis of a highly homogeneous phase of the W5O14 compound from the vapor phase, in the presence of nickel, by means of a chemical transport method in a closed quartz ampoule.

As an alternative example, a procedure is represented for the synthesis of the W5O14 compound in a through-flow reaction vessel. Both procedures yield electrically conductive threadlike crystals of the W5O14 compound. The synthesis is performed in vapor phase. Tungsten enters the reaction as a pure phase or via WS2±x, x≈4, previously synthesized from the elements, and/or the source of tungsten may also be tungsten oxides WO3−Y, 0≦y≦1. Nickel may enter the reaction via NiI2, Ni(OH)2 and/or atomic nickel.

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