| Autor: |
Vogel, I., Kucharkowski, R., Krabbes, G. |
| Zdroj: |
Fresenius' Journal of Analytical Chemistry; Jan1997, Vol. 357 Issue 1, p69-73, 5p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink