2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 1: Angell Intl. Symp. / Molten Salt, Ionic & Glass-forming Liquids: Processing and Sustainability
| Editors: | F. Kongoli, M. Gaune-Escard, J. Dupont, R. Fehrmann, A. Loidl, D. MacFarlane, R. Richert, M. Watanabe, L. Wondraczek, M. Yoshizawa-Fujita, Y. Yue |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2019 |
| Pages: | 177 pages |
| ISBN: | 978-1-989820-00-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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ELECTROCHEMICAL SYNTHESIS OF CHROMIUM BORIDES IN HALIDE-OXIDE MELTS
Hasbi Kushkhov1; Marina Ligidova1; Oksana Ashinova1; Romina Karatsukova1;1KABARDINO-BALKARIAN STATE UNIVERSITY, Nalchik, Russian Federation;
Type of Paper: Regular
Id Paper: 52
Topic: 13
Abstract:
By the method of a cyclic voltammetry, the process of electroreduction of oxygen-containing ions of chrome CrO42- and Cr2O72- and processes of their joint electroreduction with fluorborat-ion BF4- in equimolar KCl-NaCl melt at temperature 1073 K were studied.
It is shown that the electroreduction of CrO42- and Cr2O72- ions occurs in two stages with formation of chrome oxide Cr2O3 at the first stage. At the second stage, in a case of electroreduction of CrO42- ions Cr2O3 forms and a mix Cr2O3 and metal chrome forms in a case of electroreduction of Cr2O72- ions.
It is established that the fluorborat-ion in the equimolar KCl-NaCl background melt can interact with chrome ions Cr2O72- with formation of oxyfluoride chrome complexes, and boron complexes CrO2F42-, BOF2-, and BOF-.
The possibility of electrochemical synthesis of chrome boride phases in halide-oxide melts by the method of joint electroreduction of oxyfluoride complexes of chrome and boron complexes is showed.