Thermogravimetric studies of Y1Ba2Cu3O7−x superconductors

Thermogravimetric studies of Y1Ba2Cu3O7−x superconductors

The synthesis conditions and oxygen stoichiometry were determined using a thermogravimetric analyser. The kinetics of oxygenation at different temperatures and at different atmospheres were studied. The oxygenation kinetics were found to be sensitive to porosity of the material. The appropriate oxyg...

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Veröffentlicht in:Journal of materials science 1992-01, Vol.27 (16), p.4483-4488
Hauptverfasser: Sridharan, V., Chandran, D. Ravi, Srinivasan, S., Sivasankaran, S., Giridharan, L., Suresh, K., Nagarajan, T., Raman, A.
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Sprache:eng
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Zusammenfassung:The synthesis conditions and oxygen stoichiometry were determined using a thermogravimetric analyser. The kinetics of oxygenation at different temperatures and at different atmospheres were studied. The oxygenation kinetics were found to be sensitive to porosity of the material. The appropriate oxygenation temperature was found to be 400 C. For oxygenation temperatures below 400 C, the oxygenation occurs by a nucleation and growth process, whereas for higher temperatures it is diffusion limited. 13 refs.
ISSN:0022-2461
1573-4803
DOI:10.1007/BF00541583