Now showing items 31-40 of 107
WO3 pillar-type and helical-type thin film structures to be used in microbatteries
(Elsevier Science BvAmsterdamHolanda, 2007)
Microscopic and dielectric analyses of vanadium and tungsten modified barium zirconium titanate ceramics
Dielectric spectroscopy was used in this study to examine polycrystalline vanadium and tungstendoped BaZr 0.1Ti 0.90O 3 (BZT10:2V and BZT10:2W) ceramics obtained by the mixed oxide method. According to X-ray diffraction ...
Charge transfer mechanism of WO3/TiO2 heterostructure for photoelectrochemical water splitting
The present study shows how electronic parameters (e.g. band gap energy, band edge positions) on semiconductors affect photoelectrochemical activity in simulated solar light using WO3, TiO2 and WO3/TiO2 as model systems. ...
Influence of storage times on bond strength of resin cements to root canal
(Universidade Federal de São Carlos (UFSCar), Dept Engenharia Materials, 2010-01-01)
The resin cements are responsible to retention of the indirect materials decreasing marginal leakage, increasing failure resistance compared with conventional cementation. The cementation within root canal is very hard due ...
All sol-gel electrochromic smart windows: CeO2-TiO 2/Ormolyte/WO3
(Taylor & Francis Ltd, 2002-12-01)
A solid state system having the configuration WO 3/Ormolyte/CeO2-TiO2 has been assembled. Syntheses routes for tungsten oxide WO3, and cerium-titanium CeO 2-TiO2 oxide sols, were developed. A novel solid electrolyte - ...
Ethanol electrooxidation on Pt-Sn and Pt-Sn-W bulk alloys
(Sociedade Brasileira de Química, 2008)
Ethanol oxidation has been studied on Pt-Sn and Pt-Sn-W electrodes prepared in an arc-melting furnace. Different electrochemical techniques like cyclic voltammetry and chronoamperometry were used to evaluate the catalytic ...
Berreman effect in amorphous and crystalline WO3 thin films
(Amer Chemical SocWashingtonEUA, 2004)
Crystallographic properties of KSr2Nb5O15
(Elsevier B.V., 2004-09-25)
Nanostructured KSr2Nb5O15 oxide was synthesized by the polymeric precursor method, a chemical synthesis route based on the Pechini's method. The X-ray diffraction (XRD) pattern of the calcined powder at 1150 degreesC were ...
Development of an electrochemical sensor for potassium ions based on KSr(2)Nb(5)O(15) modified electrode
(Elsevier B.V., 2009-01-01)
In the work described by this paper, we studied the development of a selective potassium ion sensor constituted of a carbon paste electrode modified (CPEM) with a novel KSr(2)Nb(2)O(15). The material KSr(2)Nb(2)O(15) is ...
Effect of different radiopacifying agents on the physicochemical properties of white portland cement and white mineral trioxide aggregate
Introduction: The aim of this study was to evaluate the pH, calcium ion release, setting time, and solubility of white mineral trioxide aggregate (WMTA) and white Portland cement (WPC) combined with the following radiopacifying ...