Voltammetric measurement of the Pt electrode capacity and the determination of the polyvalent ions diffusion coefficients in the glass melt

0163483 - UACH-T 20033031 RIV CZ eng J - Journal Article
Vondrák, Jiří - Rohanová, D. - Klápště, Břetislav - Velická, Jana
Voltammetric measurement of the Pt electrode capacity and the determination of the polyvalent ions diffusion coefficients in the glass melt.
Ceramics - Silikáty. Roč. 47, č. 2 (2003), s. 51-55. ISSN 0862-5468. E-ISSN 1804-5847
R&D Projects: GA AV ČR IAA4032002
Institutional research plan: CEZ:AV0Z4032918; CEZ:MSM 262200010
Keywords : electric capacity of pt electrode * polyvalent ions * Fe3- and Cr3- ions
Subject RIV: CA - Inorganic Chemistry
Impact factor: 0.449, year: 2003

The cyclic voltammetry has been used to investigate the kinetic behaviour of polyvalent ions in a silicate glass melt within a temperature range from 900 to 1300degreesC. Standard potentials of oxidation-reduction reactions of the polyvalent elements present in glass melt as refining or colouring agents (Fe and Cr) were measured. Diffusion coefficients of Fe3- and Cr3- ions in the melt were calculated from the shape of cyclic voltammograms. Their values were found from 10(-9) to 10(-7) cm(2) s(-1) respectively. Double layer capacity (480 mu F/cm(2)) measured in the basic glass without of polyvalent elements corresponds to the high concentration of ions in the melt.
Permanent Link: http://hdl.handle.net/11104/0001275