Preparation of tantalum powder from Ta2O5 by an electrochemical reduction in an LiCl-Li2O molten salt system

Chung Seok Seo; Sang Mun Jeong; Sung Bin Park; Jin Young Jung; Seong Won Park; Sung Hyun Kim

doi:10.1252/jcej.39.77

Preparation of tantalum powder from Ta₂O₅ by an electrochemical reduction in an LiCl-Li₂O molten salt system

Chung Seok Seo, Sang Mun Jeong, Sung Bin Park, Jin Young Jung, Seong Won Park, Sung Hyun Kim

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

The electrochemical reduction of Ta₂O₅ in an LiCl-Li₂O molten salt system has been studied in an electrolytic cell with an integrated cathode assembly at 650°C. The integrated cathode assembly consists of an electric conductor, Ta₂O₅ and a porous magnesia membrane. The metallic tantalum is prepared successfully by the mechanism of an electrode reaction followed by a chemical reaction in the range of voltage between -2.47 V and -3.46 V. The chemical and physical properties of the metallic tantalum are influenced by the applied current related to the reaction rate. The XRD analysis indicates that the tantalum samples prepared at the applied current above 1.0 A have both of bcc and tetragonal structures. The particle size of those samples is similar to that of the fresh Ta₂O₅.

Original language	English
Pages (from-to)	77-82
Number of pages	6
Journal	Journal of Chemical Engineering of Japan
Volume	39
Issue number	1
DOIs	https://doi.org/10.1252/jcej.39.77
Publication status	Published - 2006 Jan 20

Keywords

Electrochemical reduction
Electrolysis
Metallic tantalum
Molten salt
Particle size

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

Access to Document

10.1252/jcej.39.77

Cite this

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title = "Preparation of tantalum powder from Ta2O5 by an electrochemical reduction in an LiCl-Li2O molten salt system",

abstract = "The electrochemical reduction of Ta2O5 in an LiCl-Li2O molten salt system has been studied in an electrolytic cell with an integrated cathode assembly at 650°C. The integrated cathode assembly consists of an electric conductor, Ta2O5 and a porous magnesia membrane. The metallic tantalum is prepared successfully by the mechanism of an electrode reaction followed by a chemical reaction in the range of voltage between -2.47 V and -3.46 V. The chemical and physical properties of the metallic tantalum are influenced by the applied current related to the reaction rate. The XRD analysis indicates that the tantalum samples prepared at the applied current above 1.0 A have both of bcc and tetragonal structures. The particle size of those samples is similar to that of the fresh Ta2O5.",

keywords = "Electrochemical reduction, Electrolysis, Metallic tantalum, Molten salt, Particle size",

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AU - Seo, Chung Seok

AU - Jeong, Sang Mun

AU - Park, Sung Bin

AU - Jung, Jin Young

AU - Park, Seong Won

AU - Kim, Sung Hyun

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AB - The electrochemical reduction of Ta2O5 in an LiCl-Li2O molten salt system has been studied in an electrolytic cell with an integrated cathode assembly at 650°C. The integrated cathode assembly consists of an electric conductor, Ta2O5 and a porous magnesia membrane. The metallic tantalum is prepared successfully by the mechanism of an electrode reaction followed by a chemical reaction in the range of voltage between -2.47 V and -3.46 V. The chemical and physical properties of the metallic tantalum are influenced by the applied current related to the reaction rate. The XRD analysis indicates that the tantalum samples prepared at the applied current above 1.0 A have both of bcc and tetragonal structures. The particle size of those samples is similar to that of the fresh Ta2O5.

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KW - Particle size

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