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

SYSNO ASEP	0163483
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Ostatní články
Title	Voltammetric measurement of the Pt electrode capacity and the determination of the polyvalent ions diffusion coefficients in the glass melt
Author(s)	Vondrák, Jiří (UACH-T) Rohanová, D. (CZ) Klápště, Břetislav (UACH-T) Velická, Jana (UACH-T)
Source Title	Ceramics - Silikáty. - : University of Chemistry and Technology Prague - ISSN 0862-5468 Roč. 47, č. 2 (2003), s. 51-55
Number of pages	5 s.
Language	eng - English
Country	CZ - Czech Republic
Keywords	electric capacity of pt electrode ; polyvalent ions ; Fe3- and Cr3- ions
Subject RIV	CA - Inorganic Chemistry
R&D Projects	IAA4032002 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z4032918 - UACH-T
	MSM 262200010
Annotation	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.
Workplace	Institute of Inorganic Chemistry
Contact	Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931
Year of Publishing	2004

Number of the records: 1