Electrochemical Reduction of Zirconia in Melts Based on Mixture of Calcium Chloride and Calcium Oxide

2016 ◽  
Vol 75 (15) ◽  
pp. 391-396
Author(s):  
L. V. Gritsai ◽  
A. A. Omel'chuk
Keyword(s):  
Electrochemical Reduction ◽  
Calcium Chloride ◽  
Calcium Oxide

The Electrochemical Reduction of Chromium Sesquioxide in Molten Calcium Chloride under Cathodic Potential Control

2007 ◽  
Vol 62 (10-11) ◽  
pp. 655-670 ◽  
Author(s):  
Carsten Schwandt ◽  
Derek J. Fray
Keyword(s):  
Molten Salt ◽  
Electrochemical Reduction ◽  
Calcium Chloride ◽  
Calcium Oxide ◽  
Reference Electrode ◽  
Graphite Anode ◽  
Cathodic Potential ◽  
Potential Control ◽  
Calcium Metal ◽  
The Stability

Electrochemical polarization and reduction experiments are reported which were performed with a three-terminal cell and a molten salt electrolyte consisting of calcium chloride with additions of calcium oxide. Employing a metal cathode, a graphite anode and a pseudo-reference electrode also made from graphite, polarization measurements were carried out with the aim to validate the performance of the pseudo-reference electrode and to assess the stability of the electrolyte. Using a chromium sesquioxide cathode in conjunction with a graphite anode and a graphite pseudo-reference electrode, electrochemical reduction experiments were conducted under potentiostatic control. The key results are: a graphite pseudo-reference electrode has been shown to be appropriate in the present type of molten salt electrochemical experiments that take place on a time scale of many hours; the conversion of chromium oxide into chromium metal has been accomplished under cathodic potential control and in the absence of calcium metal deposition; a significant amount of calcium oxide in the calcium chloride has been found necessary to preclude anodic chlorine formation throughout the entire experiment; a considerable overpotential has been identified at the anode.

Electrochemical reduction of TiO2 powders in molten calcium chloride

2015 ◽  
Vol 159 ◽  
pp. 124-130 ◽  
Author(s):  
D. Sri Maha Vishnu ◽  
N. Sanil ◽  
L. Shakila ◽  
R. Sudha ◽  
K.S. Mohandas ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Calcium Chloride
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