Wetting of boride cathode coatings by low-melting-point cryolite and liquid aluminum

Катаев, А. А.; Karimov, Kirill; Chernov, Ya. B.; Kulik, N. P.; Malkov, V. B.; Антонов, Б. Д.; Вовкотруб, Э. Г.; Zaikov, Yu. P.

doi:10.1134/s0036029510080057

Cited by 5 publications

(6 citation statements)

References 7 publications

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“…[1][2][3][4][5][6][7] A significant advantage of these melts is the possibility of applying the inert oxygen-evolving anodes and cathodes, wetted by aluminum, during electrolysis. [8][9][10][11] Nowadays, lots of research related to studying the processes occurring at oxide-metal and cermet anodes during electrolysis of melts based on KF-AlF 3 -Al 2 O 3 have already been performed. 9,[12][13][14] Noticeably less attention was paid to the study of the cathode process in these melts.…”

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confidence: 99%

Cathode Process in the KF-AlF₃-Al₂O₃ Melts

Nikolaev

Suzdaltsev

Zaikov

2019

J. Electrochem. Soc.

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Kinetics of the cathode process in the KF-AlF 3 and KF-AlF 3 -Al 2 O 3 melts has been studied by means of the steady-state polarization and voltammetry techniques. The kinetic parameters of the aluminum electrodeposition in dependence on such factors as cathode material, process temperature, alumina concentration in the melt, etc. were determined. Based on the experiment data analysis, a mechanism of the cathode process in the KF-AlF 3 -Al 2 O 3 melts was proposed. The operating parameters were defined and electrolysis was carried out.

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mentioning

confidence: 99%

Cathode Process in the KF-AlF₃-Al₂O₃ Melts

Nikolaev

Suzdaltsev

Zaikov

2019

J. Electrochem. Soc.

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“…However, as reported by Jüngling et al .,26 during the precipitation process, Fe 2 B phase precipitates at the grain boundaries and some Ti remains in the liquid phase. Iron borides are not stable in liquid aluminum33 and when the 10F specimen comes in contact with the aluminum drop, the grain boundaries react with aluminum resulting in the separation of TiB 2 particles and swelling of the specimen.…”

Section: Resultsmentioning

confidence: 99%

Pressureless Sintering of TiB₂‐Based Ceramics with Ti–Fe Additives: Sintering Mechanism and Stability in Liquid Aluminum

et al. 2012

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The development of a proper processing method for the fabrication TiB2‐based wettable cathodes for aluminum electrolysis has been challenging for more than half a century. In this work, TiB2‐based ceramics were consolidated via pressureless sintering using Ti, Fe, and Ti–Fe additives. The microstructure, physical and mechanical properties as well as the interaction and the stability of the material in liquid aluminum were investigated. It was shown that specimens sintered with a Ti–Fe additive have excellent stability in liquid aluminum as the solid TiB2 skeleton maintained its integrity and strength after 5 days of exposure in liquid aluminum at 960 °C. Transmission electron microscopy analysis revealed that the formation of inter‐particle bridges of pure TiB2 is responsible for the good resistance of the material in molten aluminum. A sintering mechanism was proposed for the consolidation of TiB2 with a Ti–Fe additive. TiB2‐based ceramic sintered with a Ti–Fe alloy is suggested as a potentially reliable material for application as wettable cathode for aluminum electrolysis.

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“…Immersion method.-Immersion is just one of several ways to determine the wetness of a system. 65 The basic principle of this method is the wetting force acting on the sample, thereby changing the weight of the record. During the experiment, the weight of the suspended sample is measured continuously when the sample is first immersed in the liquid and subsequently pulled out.…”

Section: Electrode-wettability Mechanismmentioning

confidence: 99%

Influencing Factors and Challenges on the Wettability of Electrode in Molten Salt

Kong,

Su,

et al. 2024

J. Electrochem. Soc.

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Molten salts play an important role in the electrolysis of solid metal compounds, especially oxides and sulfides, and have an impressive storage capacity and power, so they are now the electrolyte for many new types of rechargeable batteries. Unfortunately, due to the high viscosity and high surface tension of molten salt, the unsatisfactory wettability of electrode and molten salt restricts the development of molten salt electrochemistry. In the past half century, research on interface phenomena has been devoted to establishing more accurate models for measuring surface tension and wetting angle, developing more scientific wetting angle measurement techniques, and exploring the influencing factors of wettability. Different from a water solution interface, molten salt experiment are performed in high temperature and pressure environments, making it difficult to test the wetting angle, and there has been little research on the interface phenomenon of molten salt. In this Review, on the basis of existing models and experimental data, the factors and mechanisms that lead to the difference of wettability between melt and solid matrix in molten salt systems are analyzed in detail. Finally, we put forward the prospects and suggestions for the study of the wettability of melt to solid substrate in molten salt.

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Wetting of boride cathode coatings by low-melting-point cryolite and liquid aluminum

Cited by 5 publications

References 7 publications

Cathode Process in the KF-AlF₃-Al₂O₃ Melts

Cathode Process in the KF-AlF₃-Al₂O₃ Melts

Pressureless Sintering of TiB₂‐Based Ceramics with Ti–Fe Additives: Sintering Mechanism and Stability in Liquid Aluminum

Influencing Factors and Challenges on the Wettability of Electrode in Molten Salt

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Wetting of boride cathode coatings by low-melting-point cryolite and liquid aluminum

Cited by 5 publications

References 7 publications

Cathode Process in the KF-AlF3-Al2O3 Melts

Cathode Process in the KF-AlF3-Al2O3 Melts

Pressureless Sintering of TiB2‐Based Ceramics with Ti–Fe Additives: Sintering Mechanism and Stability in Liquid Aluminum

Influencing Factors and Challenges on the Wettability of Electrode in Molten Salt

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Product

Resources

About

Cathode Process in the KF-AlF₃-Al₂O₃ Melts

Cathode Process in the KF-AlF₃-Al₂O₃ Melts

Pressureless Sintering of TiB₂‐Based Ceramics with Ti–Fe Additives: Sintering Mechanism and Stability in Liquid Aluminum