Tungsten disulfide polycrystalline microfibers were successfully synthesized by a process involving electrospinning, calcination, and sulfidation steps. We used an aqueous solution of silicotungstic acid (H4SiW12O40) polyvinyl alcohol as precursors for the synthesis composite fibers needle-less electrospinning technique. The obtained green (av. diam. 460 nm) converted calcination in air to tung...

Tungsten is recognized as a critical metal due to its unique properties, economic importance, and limited sources of supply. It has wide applications where hardness, high density, wear, high-temperature resistance are required, such in mining, construction, energy generation, electronics, aerospace, defense sectors. The two primary tungsten minerals, the only minerals wolframite scheelite. Seco...

Composite TiO2-WO3 oxide materials were prepared by a single pot microemulsion method and studied during calcination treatments under dry air in order to analyze the influence of tungsten on the behavior of the dominant titania component. To this end, the surface and bulk morphological and structural evolution of the solid precursors was studied using X-ray diffraction and infrared spectroscopy...

In this study, WO3:Ni (0 at.%, 10 20 and 30 at.%) WO3:Co20 at.%: Ni (0%, 5%, 10%, 20%, 30%) thin films were deposited on glass substrates by pyrolysis spray technique then annealed at T = 500 °C. For the preparation of films, initial solution 0.1 M tungsten oxide precursors nickel sulfate 6-hydrate cobalt chloride used. After preparing effect presence impurities structural, morphology, optical ...

Recently, in chemical sensors of gases operating at low temperatures, polymeric materials with semiconducting properties are used as a gas sensitive element. One these is polyacrylonitrile (PAN). The use PAN based film material has great potential for creating that operate room temperature without heating. Development technology the production metal-containing films on to create unheated detect...