Buscar
Mostrando ítems 1-10 de 119
Non-isothermal kinetic of oxidation of tungsten carbide
(Springer, 2007-12-01)
Tungsten carbide, WC, has shown dissimilar thermal behavior when it is heated on changeable heating rate and flow of oxidant atmosphere. The oxidation of WC to WO3 tends to be in a single and slow kinetic step on slow ...
Tungsten oxide ion-gated phototransistors using ionic liquid and aqueous gating media
(Iop Publishing Ltd, 2019-07-24)
Ion-gated transistors employ ionic gating media (e.g. ionic liquids, polymer electrolytes, aqueous saline solutions) to modulate the density of the charge carriers in the transistor channel. Not only they operate at low ...
Synthesis, characterization, and catalytic properties of a mesostructured lamellar xerogel tungsten oxide phase
(ELSEVIER SCIENCE BV, 2011)
Cetyltrimethylammonium bromide (CTAB) and n-hexadecylamine (HDA) have been used as template in the synthesis of a mesolamellar xerogel tungsten oxide phase (WO(3)/CTAB/HDA). The catalytic properties of the resulting material ...
Influence of Tungsten Dopant on Sintering and Curie Temperatures of Ba(Zr0.10Ti0.90)O-3 Ceramics
(Taylor & Francis Ltd, 2008-01-01)
Ba(Zr0.10Ti0.90)O3 (BZT10) and W+ 6 substituted BZT ceramics (BZT10:W) were prepared by mixed oxide method. The effect of W+ 6 addition in the BZT was evaluated by X-ray diffraction (XRD), dilatometer analysis, microstructural ...
On-line mass spectrometry of the electro-oxidation of methanol in acidic media on tungsten carbide
(SPRINGER, 2008)
The electro-oxidation of methanol at supported tungsten carbide (WC) nanoparticles in sulfuric acid solution was studied using cyclic voltammetry, potentiostatic measurements, and differential electrochemical mass spectroscopy ...
Structural and electrochemical behavior of tungsten oxide obtained by solid state reaction
(Elsevier Science BvAmsterdamHolanda, 2006)
Detection of H2facilitated by ionic liquid gating of tungsten oxide films
(2022-01-01)
Molecular hydrogen (H2) shows promise as a future renewable energy carrier. However, due to safety concerns, its reliable detection in different atmospheres is an important issue. Here, we propose a hydrogen sensor based ...
Preparation and characterization of Mo/W bimetallic carbides by using different synthesis methods
(SPRINGER, 2008)
Molybdenum and tungsten bimetallic oxides were synthetized according to the following methods: Pechini, coprecipitation and solid state reaction (SSR). After the characterization, those solids were carbureted at programmed ...
Photochromic properties of tungstate-based glasses
(Elsevier B.V., 2007-05-15)
Vitreous samples were prepared in the NaPO(3)-BaF(2)WO(3) ternary system with high WO(3) concentrations. These glasses exhibit a strong absorption in the visible due to the presence of reduced tungsten species and the use ...
Dielectric response of tungsten modified Ba(Ti0.90Zr0.10)O3 ceramics obtained by mixed oxide method
(2010)
The electrical response of Ba(Ti0.90Zr0.10)O3 (BZT) ceramics obtained by the mixed oxide method as a functionof tungsten content was investigated. According to X-ray diffraction analysis the single phase BZT1W (1wt.% W ...