A novel method for the determination of the oxygen content of superconducting thallium cuprates
- 1 April 1993
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 6 (4) , 265-268
- https://doi.org/10.1088/0953-2048/6/4/009
Abstract
A novel wet chemical method based on the redox chemistry of the Cu(I)/Cu(II) couple and potentiostatic electrolyses is proposed for the determination of high metal valences in thallium cuprates. The sum of the extra oxidation states above +II for copper and +I for thallium, and thus the oxygen content of the sample, is obtained by reducing both Cu(III) and Tl(III) with CuCl. The excess of Cu(I) is electrolysed as a final analysis step. The quantitativity of the proposed method was demonstrated using YBa2Cu3Oz and Tl2O3 as reference materials for Cu(III) and Tl(III) respectively. Additionally, the oxygen content was determined in a single-phase superconducting sample with a nominal composition of Tl2Ba2CaCu2Oz.Keywords
This publication has 8 references indexed in Scilit:
- Hole concentration and Tc in Tl2−yBa2Ca1−zYzCu2O8−xJournal of Solid State Chemistry, 1992
- Determination of hole concentration in superconducting thallium cupratesJournal of Solid State Chemistry, 1991
- Properties of the chemically characterized thallium cuprate superconductorsPhysica C: Superconductivity and its Applications, 1990
- Chemical methods to identify the origin of oxidation in the thallium cuprate superconductorsJournal of Solid State Chemistry, 1990
- Coulometric determination of the average valencies of copper and bismuth in the superconducting bismuth-strontium-calcium-copper-oxygen systemThe Analyst, 1989
- Reduction of Ba2YCu3O7 and Y2Cu2O5 by H2Thermochimica Acta, 1989
- New procedure for determination of [Cu-O]+p charge and oxygen content in high Tc copper oxidesPhysica C: Superconductivity and its Applications, 1988
- Die Bestimmung des Thalliums in Gegenwart anderer MetalleAnalytical and Bioanalytical Chemistry, 1938