scholarly journals Электроосаждение металлов на p-Si из водных электролитов

2021 ◽  
Vol 55 (3) ◽  
pp. 286
Author(s):  
В.Н. Горяева ◽  
Р.А. Бисенгалиев
Keyword(s):  
Electrochemical Deposition ◽  
Current Density ◽  
Voltage Drop ◽  
Electrolyte Composition ◽  
Metal Coatings ◽  
Longitudinal Resistance ◽  
Metal Layers ◽  
Deposition Mode ◽  
Selection Of

The features of electrochemical deposition of metal coatings on hole silicon are presented, and the properties of the obtained metal layers are measured. The dependence of the thickness of the depleted region and the internal voltage drop in it on the composition of the electrolyte and the type of precipitated metal was investigated. The effect of current density and electrolyte composition on the properties of precipitation is proved. By selection of the electrolyte pretreatment and the deposition mode, metal precipitates with acceptable adhesion and low longitudinal resistance were obtained.

Electrochemical deposition of nanocrystalline Ni–W coatings from citrate electrolytes

2020 ◽  
pp. 111-117
Author(s):  
A. V. Krasikov ◽  
A. D. Bykova ◽  
M. V. Merkulova ◽  
M. A. Markov
Keyword(s):  
Electric Power ◽  
Electrochemical Deposition ◽  
Current Density ◽  
Power Transmission ◽  
Operating Time ◽  
Influence Of Temperature ◽  
Wear Resistant Coatings ◽  
Citrate Electrolyte ◽  
Deposition Mode ◽  
Nickel Tungsten

In this paper, requirements for wear-resistant coatings of Ni–40%W manufactured by electrochemical deposition are determined, and the electrolyte stability is studied. The influence of temperature and current density on the deposition of the Ni–W alloy from a citrate electrolyte was researched, and the optimal deposition mode was found. The maximum operating time of the electrolyte is established by the dependence of the current efficiency for the Ni–W alloy on the electric power transmission. The necessity of using membrane electrolyzers during the deposition of nickel-tungsten coatings is substantiated.

scholarly journals Electrodeposition of the Sb2Se3 thin films on various substrates from the tartaric electrolyte

2019 ◽  
Vol 10 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Vusala Asim Majidzade ◽  
Akif Shikhan Aliyev ◽  
Parvin Haydar Guliyev ◽  
Dunya Mahammad Babanly
Keyword(s):  
Thin Films ◽  
Electrochemical Deposition ◽  
Current Density ◽  
Annealing Temperature ◽  
Stoichiometric Composition ◽  
Electrolyte Composition ◽  
Present Contribution ◽  
Cyclic Polarization ◽  
X Ray ◽  
Edx Analyses

The present contribution is devoted to the electrochemical deposition of Sb2Se3 thin films from tartrate electrolyte. The study was conducted by potentiodynamic, potentiostatic and galvanostatic methods carried out under different conditions at Pt, Cu and Ni electrodes. The kinetics and mechanism of the electroreduction of antimony and selenite ions in the tartaric acid were studied separately for the electrochemical deposition. Comparison of the obtained polarization curves showed that co-deposition occurs between electroreduction potentials of antimony and selenium, indicating depolarization electrode effect for antimony ions. The influence of electrolyte compo­sition, pH, current density, temperature, etc. has been studied. On the basis of cyclic polarization, X-ray phase and SEM-EDX analyses, it is found that Sb-Se thin films are deposited on Pt and Ni electrodes, but not on Cu electrode. Black, uniform, crystalline and shiny films of the stoichiometric composition of Sb2Se3 compound are deposited on Pt and Ni electrodes within the 338-348 K temperature interval, pH 1.85, current density of 2.5-3.0 A/dm2, and annealing temperature of 703 K. Experiments were carried out using the optimal electrolyte composition containing 0.05 M SbOCl + 0.05 M H2SeO3 + 0.007 M C4H6O6.

Study on Special Morphology Hydroxyapatite Bioactive Coating by Electrochemical Deposition

2013 ◽  
Vol 537 ◽  
pp. 256-260
Author(s):  
Cai Ge Gu ◽  
Qian Gang Fu ◽  
He Jun Li ◽  
Jin Hua Lu ◽  
Lei Lei Zhang
Keyword(s):  
Electrochemical Deposition ◽  
Current Density ◽  
Electrolyte Concentration ◽  
Spherical Particles ◽  
Constant Current ◽  
Constant Current Density ◽  
Depth Direction ◽  
Special Morphology ◽  
Calcium Phosphate Coatings ◽  
Coating Weight

Bioactive calcium phosphate coatings were deposited on carbon/carbon（C/C） composites using electrochemical deposition technique. The effects of electrolyte concentration and constant current density on morphology, structure and composition of the coating were systematically investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transformed infrared (FTIR) spectroscopy. The results show that, the coating weight elevated gradually with the increase of electrolyte concentration, and the morphology of coatings changed from spherical particles to nanolamellar crystals with interlocking structure initially. Then the coating transformed into seaweed-like and nano/micro-sized crystals along the depth direction of the coating. The coatings showed seaweed-like morphology as the deposition current density was less than 20mA. With the less current density, the coating became more homogenous. However, the coating was fiakiness crysal, with needlike crystal stacked upside as the current density reached to 20mA/cm2. The coating weight was improved gradually when the current density increased from 2.5mA/cm2 to 10mA/cm2, then reduced with the increasing current density in the range of 10 to 20mA/cm2.

Preparation and Characterization of CMC-PVA/PVA-SA-MePc (COOH)8/CS-PVA Bipolar Membrane Using Electrospinning Technique

2013 ◽  
Vol 774-776 ◽  
pp. 795-798
Author(s):  
Ting Jin Zhou ◽  
Min Lu ◽  
Ri Yao Chen
Keyword(s):  
Polyvinyl Alcohol ◽  
Water Splitting ◽  
Current Density ◽  
Voltage Drop ◽  
High Current Density ◽  
High Current ◽  
Bipolar Membrane ◽  
Electrospinning Technique ◽  
Exchange Layer

Carboxymethyl cellulose (CMC)-polyvinyl alcohol (PVA) and chitosan (CS)-polyvinyl alcohol were cross-linked by Fe3+and glutaraldehyde respectively to prepare cation exchange layer and anion exchange layer, and polyvinyl alcohol-sodium alginate (SA)-metal octocarboxyphthalocyanine (MePc (COOH)8, a kind of water splitting catalyst, here, Me stands for Fe3+or Co2+) nanofibers were prepared by electrospinning technique and introduced into the interlayer to obtain the CMC-PVA/PVA-SA-MePc (COOH)8/CS-PVA bipolar membrane (BPM). The experimental results showed that compared with the BPM without the PVA-SA-MePc (COOH)8interlayer, the water splitting efficiency at the interlayer of the CMC-PVA/PVA-SA-MePc (COOH)8/ CS-PVA BPM was obviously increased, and its membrane impedance decreased. When the concentration of FePc (COOH)8in the PVA-SA-FePc (COOH)8nanofibers was 3.0%, the trans-membrane voltage drop (IRdrop) of the CMC-PVA/PVA-SA-FePc (COOH)8/CS-PVA BPM was as low as 0.6V at a high current density of 90 mA/cm2.

Effect of electrolyte composition and current density on the particle size of electrolytic powders

1987 ◽  
Vol 26 (6) ◽  
pp. 431-433
Author(s):  
A. B. Suchkov ◽  
A. S. Vorob'eva ◽  
V. N. Kryzhova ◽  
L. V. Ryumina ◽  
A. G. Kaganov ◽  
...  
Keyword(s):  
Particle Size ◽  
Current Density ◽  
Electrolyte Composition

scholarly journals Homoleptic and heteroleptic N-alkylimidazole zinc(ii)-containing ionic liquids for high current density electrodeposition

2014 ◽  
Vol 43 (32) ◽  
pp. 12329-12341 ◽  
Author(s):  
Marc Steichen ◽  
Neil R. Brooks ◽  
Luc Van Meervelt ◽  
Jan Fransaer ◽  
Koen Binnemans
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Current Density ◽  
High Current Density ◽  
High Current ◽  
High Quality ◽  
Metal Coatings ◽  
Zinc Metal

Ionic liquids with a zinc(ii) ion as an integral part of the ionic liquid cation are very useful electrolytes for the fast electrodeposition of high-quality zinc metal coatings.

Non-aqueous electrochemical deposition of lead zirconate titanate films for flexible sensor applications

2017 ◽  
Vol 31 (31) ◽  
pp. 1750287
Author(s):  
Sherin Joseph ◽  
A. V. Ramesh Kumar ◽  
Reji John
Keyword(s):  
Electrochemical Deposition ◽  
Lead Zirconate Titanate ◽  
Current Density ◽  
Piezoelectric Materials ◽  
Deposition Process ◽  
Lead Zirconate ◽  
Spectroscopic Studies ◽  
Raman Spectroscopic ◽  
Sensor Applications ◽  
Zirconate Titanate

Lead zirconate titanate (PZT) is one of the most important piezoelectric materials widely used for underwater sensors. However, PZTs are hard and non-compliant and hence there is an overwhelming attention devoted toward making it flexible by preparing films on flexible substrates by different routes. In this work, the electrochemical deposition of composition controlled PZT films over flexible stainless steel (SS) foil substrates using non-aqueous electrolyte dimethyl sulphoxide (DMSO) was carried out. Effects of various key parameters involved in electrochemical deposition process such as current density and time of deposition were studied. It was found that a current density of 25 mA/cm2 for 5 min gave a good film. The morphology and topography evaluation of the films was carried out by scanning electron microscopy (SEM) and atomic force microscopy (AFM), respectively, which showed a uniform morphology with a surface roughness of 2 nm. The PZT phase formation was studied using X-ray diffraction (XRD) and corroborated with Raman spectroscopic studies. The dielectric constant, dielectric loss, hysteresis and I–V characteristics of the film was evaluated.

scholarly journals Modeling of asynchronous motor operation modes for the correct selection of voltage regulation devices

2020 ◽  
Vol 178 ◽  
pp. 01015 ◽  
Author(s):  
Azat Akhmetshin ◽  
George Marin ◽  
Dmitrii Mendeleev
Keyword(s):  
Voltage Drop ◽  
Asynchronous Motor ◽  
Electric Circuit ◽  
Voltage Regulation ◽  
Correct Selection ◽  
Voltage Level ◽  
Nominal Voltage ◽  
Motor Operation ◽  
Technical Solutions ◽  
Selection Of

Many electrical appliances are used in production and in everyday life, which include elements that are extremely sensitive to voltage deviations from acceptable values. Failure in their work can cause equipment failure or a breakdown in technological processes. There are a number of technical solutions to solve this problem, one of which is the using of voltage control devices such as boost transformers. The principle of operation of booster transformers is the introduction of a longitudinal EMF into the electric circuit, which provides booster. The choice of voltage regulation devices consists in determining its power and the required transformation ratio. The latter needs some justification, because it cannot be formally accepted: if it is necessary to increase the voltage, for example by 5%, it is enough to introduce a longitudinal EMF of 5% of the nominal voltage into the electric circuit. This is due to the fact that with increasing voltage from the load side, the power consumption also increases, which causes an increase in voltage drop compared to modes in the absence of voltage regulation devices. Thus, the load will receive a slightly lower voltage level in comparison with the desired one.

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