Determination of oxygen stoichiometry in a small mass of cuprate superconductor by iodometric microtitration
- 1 March 1993
- journal article
- Published by IOP Publishing in Superconductor Science and Technology
- Vol. 6 (3) , 209-213
- https://doi.org/10.1088/0953-2048/6/3/009
Abstract
The authors have developed a method of determining oxygen stoichiometry (y) of small masses of cuprate oxides, based on iodometric microtitration. It comprises double microtitration. The first microtitration was carried out on a Cu2+ solution of accurately known concentration. A small mass ( approximately 500 mu g) was accurately determined by an absolute calibration of a microbalance to within +or- approximately 0.8 mu g. They obtained y=6.960+or-0.009 from ten microtitrations on small masses extracted from a large ceramic sample of YBa2Cu3Oy. This method can be used to determine oxygen stoichiometry in single crystals and in thin films of cuprate superconductors.Keywords
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