Microstructure and mechanical properties of rhenium prepared by electroforming in NaCl-KCl-CsCl-K 2 ReCl 6 molten salts

Wang, Jiangfan; Bai, Shuxin; Ye, Yicong; Zhang, Hong

doi:10.1016/j.ijrmhm.2018.01.001

Cited by 14 publications

(2 citation statements)

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“…This method has a number of advantages, as opposed to other known methods of rhenium production; it allows obtaining rhenium in metallic and powder form; compact, plastic, non-porous and coherent rhenium layers may be formed on a complex large-scale substrate. Chloride [ 14 , 15 , 16 , 17 ], fluoride [ 18 , 19 ], chloride–fluoride [ 20 ] and fluoride–borate melts [ 2 , 21 , 22 ] may be used as electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF4-B2O3-KReO4

et al. 2022

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The electrochemical behavior of rhenium ions in the molten KF-KBF4-B2O3 salt was systematically studied, and pure metallic rhenium was obtained at the cathode. The processes of rhenium ions reduction and diffusion in molten KF-KBF4-B2O3 were determined using cyclic voltammetry, stationary galvanostatic and polarization curves analyses. The values of diffusion coefficients were 3.15 × 10−5 cm2/s and 4.61 × 10−5 cm2/s for R1 and R2, respectively. Rhenium electrodeposition was carried out at a constant potential. The process of rhenium cathode reduction in KF-KBF4-B2O3 at 773 K was found to be a one-step reaction Re(VII) → Re, and rhenium electrodeposition presumably occurred from two types of complex rhenium ions (KReO4 and K3ReO5). Both processes are quasi-reversible and controlled by diffusion. The obtained cathode deposit was analyzed by SEM, EDX, ICP-OES and XRD methods. The obtained deposit had a thread structure and rhenium was the main component.

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Section: Introductionmentioning

confidence: 99%

Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF4-B2O3-KReO4

et al. 2022

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“…The large possibilities for obtaining the compact rhenium layers are opened through using the molten salts. [9][10][11] Currently, this approach is developed and widely applied. The disadvantage of the electrolysis in molten chlorides is that the rhenium chlorides are able to transfer to the oxichlorides under oxygen atmosphere.…”

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confidence: 99%

Rhenium Electrowinning in the KF-KBF₄-B₂O₃-KReO₄Melt

Chernyshev

Apisarov

Исаков

et al. 2018

J. Electrochem. Soc.

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The rhenium electrodeposition from the KF-KBF 4 -B 2 O 3 -KReO 4 melts at 773 K was studied by the cyclic voltammetry. Two waves were found on the E(i) dependences in the cathode region corresponding to the reduction of Re (VII) to metallic Re: Re 7+ +3e→Re 4+ , and Re 4+ +4e→Re 0 . The galvanostatic electrolysis in the KF-KBF 4 -B 2 O 3 -KReO 4 melt in an atmosphere of an ambient air was performed. It was revealed that the use of the KF-KBF 4 -B 2 O 3 -KReO 4 electrolyte (with 5.4 wt% Re) provides the Re electrowinning on the Re substrate during 20 h at 773 K without a decrease in the rhenium ions concentration. The electrolytic deposits were analyzed by the XRD, SEM-EDS and ICP-AES spectroscopy. It was demonstrated that the electrolytic deposits were the metallic Re with a purity of 99.98 wt%. The operating conditions for producing the Re deposit with a current efficiency of 98% were determined.

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A comparative study of rhenium coatings prepared on graphite wafers by chemical vapor deposition and electrodeposition in molten salts

Wang

Bai

et al. 2020

Rare Met.

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Microstructure and mechanical properties of rhenium prepared by electroforming in NaCl-KCl-CsCl-K 2 ReCl 6 molten salts

Cited by 14 publications

References 20 publications

Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF4-B2O3-KReO4

Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF4-B2O3-KReO4

Rhenium Electrowinning in the KF-KBF₄-B₂O₃-KReO₄Melt

A comparative study of rhenium coatings prepared on graphite wafers by chemical vapor deposition and electrodeposition in molten salts

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Microstructure and mechanical properties of rhenium prepared by electroforming in NaCl-KCl-CsCl-K 2 ReCl 6 molten salts

Cited by 14 publications

References 20 publications

Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF4-B2O3-KReO4

Rhenium Electrodeposition and Its Electrochemical Behavior in Molten KF-KBF4-B2O3-KReO4

Rhenium Electrowinning in the KF-KBF4-B2O3-KReO4Melt

A comparative study of rhenium coatings prepared on graphite wafers by chemical vapor deposition and electrodeposition in molten salts

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Rhenium Electrowinning in the KF-KBF₄-B₂O₃-KReO₄Melt