Covered Electrodes
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Novel Route for Fabrication of ZnO nanorods-Au Nanoparticles Hybrids Directly Supported on Substrate and their Application as Gas Sensors
The aim of this study was to develop a novel, simple and fast route to prepare ZnO nanorods (NRs) -Au nanoparticles (NPs) hybrids directly supported on a substrate to be used in gas sensor devices. The ZnO NRs were promptly grown on interdigitated Au electrodes Al2O3 substrates by chemical bath deposition at a low temperature. After that, Au NPs were deposit
Mat. Res.. Publicado em: 23/04/2018
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2. ELECTROCHEMICAL OXIDATION OF ETHYLENE AT PANI/Pt AND Ag/PANI/Pt MODIFIED ELECTRODES
The electrochemical behavior of ethylene on PANI/Pt and Ag/PANI/Pt modified electrodes was investigated in different media. Morphology of the deposits of PANI were observed by SEM analysis, complemented by the EDX techniques to obtain the Ag composition that shows that Ag is deposited in the polymeric matrix which covered the whole platinum surface. The elec
Quím. Nova. Publicado em: 2016-09
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3. Efecto de la Profundidad sobre la Soldabilidad de Aceros Ferríticos en Ambientes Simulados Unidos por Soldadura Húmeda
Abstract The objective of this work is to evaluate the influence of depth variation on multipass V-groove weld metal properties. Commercial base metal and covered electrodes (ASTM A36 and E7014) and four different conditions were used to perform the wet welds at 10, 20, 30 and 40 m depth. A pressurized chamber with 30 atmospheres capacity filled with water w
Soldag. insp.. Publicado em: 2016-06
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4. Boron Doped Ultrananocrystalline Diamond Films on Porous Silicon: Morphological, Structural and Electrochemical Characterizations
Boron doped ultrananocrystalline diamond (BDUND) films were grown and characterized on porous silicon (PS) substrates. PS samples were prepared from n-type monocrystalline silicon wafers (100) with 1-20 Ω.cm of resistivity, by electrochemical etching, using HF-acetonitrile solution as electrolyte. BDUND films were grown by Hot Filament Chemical Vapor Deposi
Mat. Res.. Publicado em: 24/11/2015
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5. Síntese e caracterização de nanopartículas Fe3O4@Au e desenvolvimento de sensores para aplicações em nanomedicina / Synthesis and characterization of Fe3O4@Au nanoparticles and development of sensors for application in nanomedicine
Along with the development of nanomaterials came the knowledge and design of their unique eletronic, optical and catalitycal properties which may be used for a variety of nanotecnological applications. A special class of nanomaterials with interesting characteristics is represented by the CoreαShell nanoparticles, which combine the physicochemical prop
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/07/2012
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6. Preparação e caracterização eletroquímica de filmes finos de nanotubos de carbono depositados sobre ITO / Preparation and electrochemical characterization of thin films of carbon nanotubes deposited on ITO
In this work were carried out some studies on electrochemical properties of carbon nanotubes (CNT) thin films deposited on ITO (Indium Tin Oxide) electrodes by electrophoretic deposition (EPD). Capacitance and electrochemical area measurements were made with films of three types of nanotubes with different dimensions and previous treatments. All measurements
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/07/2011
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7. Desenvolvimento de uma metodologia de fabricação de transistores de filmes finos orgânicos. / Development of a manufacturing methodology for organic thin film transistors.
In this work, it is presented a methodology for organic thin-film transistor (OTFT) fabrication. Poly(3-hexylthyophene) (P3HT):[6,6]-phenyl-C61-butyric acidmethyl ester (PCBM) bulk heterojunction solar cells were studied for their maximum power conversion efficiency (PCE) around 5 %. Efficiencies evolution in time from 10-6 to 1.7 % show the difficulties inv
Publicado em: 2010
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8. Valoración del desempeño de un dispositivo de autoalimentación diseñado para la evaluación operativa de electrodos revestidos
The objective of the present work is to evaluate the effectiveness of a self-feed device for covered electrodes. This device is able of eliminate disturbances from manual operation or the use of automatic control systems during the study of covered electrode behavior. The conjugation of different methods like short-circuit time statistical analysis, metallog
Soldagem & Inspeção. Publicado em: 2009-03
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9. Corrosion of ASTM A 285 grade C steel welds used in celullose production by kraft process / Corrosão nas soldas do aço ASTM A 285 grau C empregados na obtenção de celulose pelo método Kraft
In this work samples of ASTM A 285 Grade C class steel, welded with covered electrodes AWS E7018 and AWS E6013, and with variations in the welding energy, were tested electrochemically, immersed in alkaline liquor, which is used in Kraft batch digesters. Workpieces were cut by electroerosion process from base metal (MB), heat affected zone (ZTA) and weld met
Publicado em: 2007
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10. Compósitos diamante-CVD/Fibra de carbono como ânodo em baterias de íons de lítio / DIAMOND/CARBON FIBER COMPOSITE AS ANODE IN LITHIUM ION BATTERIES
An innovative composite diamond/carbon fiber is presented for application as negative electrode (anode) in lithium ion batteries. In this sense, it was important the understanding and discussion of three subjects divided into: obtaining and characterization of the carbon fiber, used as substrate; growth and characterization of doped diamond film on the fiber
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/07/2006
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11. Compósitos diamante-CVD/Fibra de carbono como ânodo em baterias de íons de lítio / DIAMOND/CARBON FIBER COMPOSITE AS ANODE IN LITHIUM ION BATTERIES
An innovative composite diamond/carbon fiber is presented for application as negative electrode (anode) in lithium ion batteries. In this sense, it was important the understanding and discussion of three subjects divided into: obtaining and characterization of the carbon fiber, used as substrate; growth and characterization of doped diamond film on the fiber
Publicado em: 2006
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12. "Synthesis and characterization of polyaniline mixed in different polymeric matrices for protection against corrosion of metallic alloys" / "Síntese e caracterização da mistura de polianilina em diferentes matrizes poliméricas para proteção contra a corrosão de ligas metálicas"
In this work, polyaniline (PAni) blends and composites were obtained on platinum (Pt) and stainless steel (AISI-304) substrates. The effects of chemical and electrochemical syntheses were studied in different aqueous media. PAni blends and composites were prepared from aniline monomer-containing solutions of H3PO, that contained different concentrations of s
Publicado em: 2006