Electrochemical Synthesis of Rare-Earth Hexaborides in Chloride–Oxide Melts

Chloride–oxide melts used in electrosynthesis of calcium and rare-earth borides have been studied by Raman and IR spectroscopies. The results, in combination with analysis of data in the literature, have been used to identify the mechanism underlying the sequential transition of solid lanthanide oxi...

Full description

Saved in:
Bibliographic Details
Published in:Inorganic materials 2023-12, Vol.59 (12), p.1356-1362
Main Authors: Chukhvantsev, D. O., Shurov, N. I., Zakiryanova, I. D., Filatov, E. S.
Format: Article
Language:English
Subjects:
Borides
Calcium chloride
Chemical synthesis
Chemistry
Chemistry and Materials Science
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Melts
Rare earth elements
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Chloride–oxide melts used in electrosynthesis of calcium and rare-earth borides have been studied by Raman and IR spectroscopies. The results, in combination with analysis of data in the literature, have been used to identify the mechanism underlying the sequential transition of solid lanthanide oxides to an ionic form in molten calcium chloride. Using chronopotentiometry and cyclic voltammetry, we have demonstrated that the boride formation is a two-step process. An overall reaction has been proposed that describes the electrochemical boride synthesis process. The proposed mechanism is consistent with the laws of chemical thermodynamics and allows one to describe the exchange and electrode reactions involved.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168523120038