2021年8月15日 · Mechanical and tribological properties of pulsed electric current sintered monolithic WO2.9 were studied by nanoindentation and nanoscratch, and the composites of ZrO2 + WO 2.9 with reciprocating wear tests. Hardness of WO 2.9 at 25 °C was ~11 GPa and reduced elastic modulus was ~150 GPa.

Elemental composition and chemical structure are confirmed via X-ray photoelectron spectroscopy (XPS) analyses, while X-Ray diffraction analysis (XRD) and Fourier-transform infrared spectroscopy...

2020年6月1日 · High-purity ultrafine W or WC powder was prepared via a two-step process composed of the carbothermic pre-reduction of WO 2.9 and the following deep reduction with H 2 or carbonization with CH 4 +H 2 mixed gases.

WO2-NaxWO3 nanoparticles modified carbon spheres (WO2-NaxWO3/CSs) composite has been successfully synthesized by simple hydrothermal synthesis and high temperature calcination, and highly...

X-ray diffraction (XRD) pattern. As shown in Supplementary Fig. 4, besides of the predominant characteristics of underlying Ni foam, the XRD pattern of WO 2 sample reveals a set of...

2023年7月13日 · The aberration-corrected high-angle annular dark-field STEM (AC HAADF-STEM) images show individual Cu atoms uniformly distributed over the WO 2.72 nanowires, and no Cu nanoparticles or clusters could be found, in good accordance with the X-ray diffraction (XRD) analysis (Figure S11, Supporting Information). Further, the AC HAADF-STEM image and ...

2015年7月6日 · We present the results of our in situ X-ray diffraction (XRD) and Raman spectroscopy measurements for the first Li-ion extraction/insertion (charge/discharge) processes of nickel-rich Li 1+x (Ni y Co z Mn z) w O 2 (0.005<x …

Browse many computed properties for this cubic WO2 compound, including formation energy from the elements, energy of decomposition into the set of most stable materials at this chemical composition, bulk crystalline density, and band gap.

High-angle annular dark-field scanning transmission electron micrograph (HAADF-STEM) images of the samples WO3 (a,c) and WO2.9 (b,d). W atoms can be clearly observed, yellow spots in a,c and blue...

1999年6月10日 · Bulk and surface properties of Pd/WO 3 and Pd/WO 2 catalysts were studied using temperature programmed reduction, X-ray diffraction, X-ray absorption, and X-ray photoelectron spectroscopies. Special attention was paid to the oxidation state of tungsten upon reduction under hydrogen at 350 and 600°C.