Abstract
To characterize the real stoichiometry of ceramic high-temperature superconductors of the Y-Ba-Cu-O type and the Bi(Pb)-Ca-Sr-Cu-O type complex, chemical methods including digestion, separation and subsequent titrimetric determination of the elemental components were investigated. Using optimized automatic titration procedures with photometric, potentiometric or voltametric equivalence point detection, a high accuracy of the analytical results could be achieved. The random as well as the systematic errors are less than 0.5%. The exact stoichiometric coefficients of the components and thereby the phase compositions or the single phase character of the materials were determined and compared with the results of X-ray diffraction measurements.
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Received : 27 November 1995/Revised: 5 February 1996/Accepted: 10 February 1996
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Vogel, I., Kucharkowski, R. & Krabbes, G. Titrimetric determination of the stoichiometric composition of ceramic high-temperature superconducting materials. Fresenius J Anal Chem 357, 69–73 (1997). https://doi.org/10.1007/s002160050113
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DOI: https://doi.org/10.1007/s002160050113