Electrochemical Deposition of CoNiFe Alloy from Concentrated Chloride Electrolyte

2020 ◽  
Vol 22 (8) ◽  
pp. 422-433
Author(s):  
R.D. Tikhonov ◽  
Keyword(s):  
Metal Ions ◽  
Electrochemical Deposition ◽  
Concentration Ratio ◽  
High Heat ◽  
Mechanical Stresses ◽  
Experimental Results ◽  
Uniform Structure ◽  
Magnetic Parameters ◽  
Chloride Electrolyte ◽  
Positive Ions

Heating the chloride electrolyte to a temperature of 70 °C at the concentration ratio of CCo:CNi:CFe 1:1:1 provides stabilization of electrochemical deposition of the CoNiFe alloy components as a result of discharge of metal ions (Fe2+ Cl- )+ , (Со2+ Cl- )+ , (Ni2+ Cl- )+. Electrolyte filtering and correcting pH with HCl provides a reproducible deposition of CoNiFe films. Based on the experimental results of the CoNiFe films, a mechanism of electrochemical deposition is proposed, which differs in view of the phenomena occurring in the volume of electrolyte: mass draft ions, with the determining effect of mobility and the formation of positive ions on the anode. CoNiFe films are produced without mechanical stresses, with a uniform structure and with high magnetic parameters without high heat firing.

scholarly journals Mechanism of the Electrochemical Deposition of a CoNiFe Alloy

2020 ◽  
pp. 1-8
Author(s):  
Robert Dmitrievich Tikhonov
Keyword(s):  
Electrochemical Deposition ◽  
Ion Mobility ◽  
Cathode Current Density ◽  
Uniform Structure ◽  
Deposition Mechanism ◽  
Magnetic Parameters ◽  
Chloride Electrolyte ◽  
Positive Ions ◽  
Cathode Current ◽  
Cobalt Species

Heating the chloride electrolyte to a temperature of 70°C ensures the normal codeposition of the components of the CoNiFe alloy as a result of the discharge of single-charged iron and cobalt species (Fe2+Cl-)+ and (Co2+Cl-)+, respectively and double-charged Ni2+ ions at a high cathode current density. The chloride electrolyte obtained with filtration and pH correction by hydrochloric acid provides the electrochemical deposition of CoNiFe films with a CCo:CNi:CFe ratio of 1:1:1. The mechanism of the abnormal deposition of Co, Fe and Ni occurs due to the incomplete ionization of atoms and differences in ion mobility. Based on the experimental results of CoNiFe films, an electrochemical deposition mechanism is proposed. In contrast to the well-known in the literature, the phenomena occurring in the volume of electrolyte, including transmission of ions, with the determining effect is the mobility and formation of positive ions on the anode. CoNiFe films are produced without mechanical stresses, with a uniform structure and with high magnetic parameters without a high burn temperature. Electrochemical deposition when the charge of ions in the electrolyte is taken into account allows to obtaining a reproducible electrochemical deposition of CoNiFe films.

Experimental results from a high heat flux solar furnace with a molten metal-cooled receiver SOMMER

Solar Energy ◽  
2021 ◽  
Vol 221 ◽  
pp. 176-184
Author(s):  
F. Müller-Trefzer ◽  
K. Niedermeier ◽  
F. Fellmoser ◽  
J. Flesch ◽  
J. Pacio ◽  
...  
Keyword(s):  
Heat Flux ◽  
Molten Metal ◽  
High Heat ◽  
Experimental Results ◽  
Solar Furnace ◽  
High Heat Flux

scholarly journals Effective Removal of Fluoride onto Metal Ions Loaded Orange Waste

2012 ◽  
Vol 27 ◽  
pp. 61-66 ◽  
Author(s):  
Kedar Nath Ghimire
Keyword(s):  
Metal Ions ◽  
Removal Efficiency ◽  
Orange Juice ◽  
Experimental Results ◽  
Fluoride Removal ◽  
Acidic Ph ◽  
Neutral Ph ◽  
Effective Removal ◽  
Orange Waste ◽  
Ph Range

Removal of fluoride is investigated onto several metal ions loaded phosphorylated orange juice residue and commercially available alumina. The experimental results revealed that cerium (IV) loaded phosphorylated orange waste indicated excellent fluoride removal efficiency at acidic pH range and while that lanthanum loaded at neutral pH range. Both the metal loaded adsorbents are found superior to the commercially available activated alumina.DOI: http://dx.doi.org/10.3126/jncs.v27i1.6660 J. Nepal Chem. Soc., Vol. 27, 2011 61-66 

Selective separation and recovery of silver and copper from mixtures by photocatalysis

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744096
Author(s):  
Mali Ding ◽  
Weijun Zhang ◽  
Zhaofeng Xie ◽  
Rihua Lei ◽  
Jianfang Wang ◽  
...  
Keyword(s):  
Metal Ions ◽  
Ethylene Diamine Tetraacetic Acid ◽  
Uv Light ◽  
Electronic Waste ◽  
Experimental Results ◽  
Tetraacetic Acid ◽  
Selective Recovery ◽  
Valuable Metals ◽  
Effects Of Ph ◽  
Environmental Importance

Separation and recovery of valuable metals including silver (Ag) and copper (Cu) from electronic waste mixtures are of great economic and environmental importance. Recent years, semiconductor photocatalysts have been investigated intensively for the removal of Ag from wastewater. Few studies have been carried out on the effect of pH and co-exist metal ions such as Cu on Ag. In this study, ZnO and TiO2 were applied as photocatalysts to target on the selective recovery Ag and Cu from its mixtures under UV light. The effects of pH, catalyst, ethylene-diamine tetraacetic acid (EDTA) on the Ag and Cu photo-reduction were studied. Modeling of Ag[Formula: see text] and Cu[Formula: see text] with and without EDTA distribution together with metal precipitations was plotted against pH to understand the chemistry involved in photocatalysis. Experimental results showed that Ag[Formula: see text] photo-reduction was nearly completed by ZnO and TiO2 to Ag metal, while Cu[Formula: see text] photo-reduction to Cu2O only occurs by ZnO in the presence of EDTA. This work illustrates that semiconductor photocatalysts are suitable for selective recovery of Ag and Cu from wastewaters.

Heatlane Technology for High Heat Flux Chip Cooling

2004 ◽  
Author(s):  
Takahiro Katoh ◽  
Marlin Vogel ◽  
Guoping Xu ◽  
Shlomo Novotny
Keyword(s):  
Heat Flux ◽  
Heat Sink ◽  
High Reliability ◽  
High Heat ◽  
Experimental Results ◽  
High Heat Flux ◽  
Pulsating Heat Pipe ◽  
Fin Efficiency ◽  
Chip Cooling ◽  
Strong Candidate

This paper proposes a new solution for high heat flux chip cooling. The authors attempted to apply Heatlane technology for a heat sink of high-end server chip cooling. This unique technology, which is also called oscillating or pulsating heat pipe, showed very high thermal performance, and the experimental results were compared with conventional copper base heat sink in this paper. The experimental and analysis results showed that the Heatlane technology transferred heat very effectively and highly improved the fin efficiency. And the Heatlane heat sink also showed very small gravity effect and high reliability under vibrating conditions. Those experimental results were also shown in this paper. From this study, the authors has convinced that the Heatlane technology for a heat sink can be a strong candidate to solve a thermal issue of high heat flux chip cooling, especially for high-end server applications.

scholarly journals Design and fabrication of photoactive imidazole-based poly(ether-imide)s and a polyimide/HBP-modified SiO2 composite: toward high heat-resistance, antimicrobial activity and removal of heavy metal ions

RSC Advances ◽  
2021 ◽  
Vol 11 (38) ◽  
pp. 23574-23588
Author(s):  
Diyari Khaki ◽  
Hassan Namazi ◽  
S. Mojtaba Amininasab
Keyword(s):  
Heavy Metal ◽  
Antimicrobial Activity ◽  
Heat Resistance ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
High Heat ◽  
High Heat Resistance

Novel thermostable, photoactive, and solvable poly(ether-imide)s containing imidazole-based pendant groups and a BTDA-PIb/HBP@SiO2 composite were synthesized and used due to their antimicrobial activity and as an adsorbent to remove heavy metal ions.

BREAKDOWN OF A RADIO-FREQUENCY DISCHARGE IN THE PRESENCE OF A SUPERIMPOSED d-c. FIELD

1965 ◽  
Vol 43 (8) ◽  
pp. 1543-1551 ◽  
Author(s):  
S. N. Sen ◽  
B. Bhattacharjee
Keyword(s):  
Radio Frequency ◽  
Breakdown Voltage ◽  
Experimental Results ◽  
Breakdown Field ◽  
Theoretical Expression ◽  
Rare Gases ◽  
Field Frequency ◽  
Radio Frequency Field ◽  
Frequency Field ◽  
Positive Ions

Breakdown voltages have been determined in the case of some rare gases (He, Ne, A) and oxygen at a constant pressure (10 mm Hg) when excited simultaneously by a radio-frequency field (frequency 10 Mc/sec) and a variable d-c. field. It is found in all cases that the breakdown voltage is higher when both the fields are present than when the gases are excited by the radio-frequency field alone and the breakdown voltage gradually increases with the increase of the applied d-c. field. The variation of breakdown field with d-c. field is of the same nature in all of the gases studied. A theoretical expression for the breakdown voltage in the presence of both the r-f. and d-c. fields has been deduced from the theory of electrical discharge by Kihara (1952) together with the expression of equivalent length as deduced by Varnerin and Brown (1950). The theoretical expression cannot explain satisfactorily the experimental results, and the rate of rise of breakdown voltage in the d-c. field as obtained from theory is smaller than that obtained from experimental results. The discrepancy has been ascribed partly to the uncertainty in the values of the numerical constants introduced by Kihara and also to the increase of diffusion caused by the presence of positive ions—a factor which has not been taken into consideration in the present treatment.

scholarly journals Mapping the Surface Heat of Luminescent Solar Concentrators

Optics ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 259-265
Author(s):  
Yujian Sun ◽  
Yongcao Zhang ◽  
Yilin Li
Keyword(s):  
Power Conversion Efficiency ◽  
Potential Application ◽  
Concentration Ratio ◽  
Power Conversion ◽  
High Heat ◽  
Surface Heat ◽  
Heat Power ◽  
Solar Concentrators ◽  
Building Integrated Photovoltaics ◽  
Luminescent Solar Concentrators

Luminescent solar concentrators (LSCs) have been widely studied for their potential application as building-integrated photovoltaics (BIPV). While numerous efforts have been made to improve the performance, the photothermal (PT) properties of LSCs are rarely investigated. In this report, we studied the PT properties of an LSC with a power conversion efficiency (PCE) of 3.27% and a concentration ratio of 1.42. The results showed that the total PT power of the LSC was 13.2 W, and the heat was concentrated on the edge of the luminescent waveguide with a high heat power density of over 200 W m−2.

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