Abstract
The influence of the melt composition on the redox ratio of copper in binary sodium silicates at 1000 °C was determined by means of in situ electrochemical methods. The redox ratio was calculated from the currents measured by Repetitive Multi-Pulse Chronoamperometry. It appears that the redox ratio does not depend on the total copper concentration over the range 0,25 to 1 wt% Cu. However, the proportion of copper(II) was found to increase with increasing basicity, ie with increasing the sodium oxide content. We deduced from a model based on the formation of pure ionic oxocomplexes that the coordination number of the Cu(II) oxocomplex is greater than that of the Cu(I) oxocomplex. The difference between the coordination numbers, which is calculated from the experimental results is equal to 0.56. The fractional number is quite far from the integer that would indicate the occurrence of well defined oxocomplexes of copper.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
