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Thermoanalytical study of the formation of compounds in the PbO−MO (M=Ca, Sr, Ca+Sr) system

  • Metallurgical Systems and Superconductors
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Abstract

In order to clarify the effect of PbO addition on the formation steps of the superconducting phases in the system Bi2O3−SrO−CaO−CuO, a study of solid-state reactions under non-isothermal conditions, in the PbO−MO (M=Ca, Sr, Ca+Sr) system has been carried out.

Results suggest that the reactivity of the components in the system containing PbO and CaO is much higher than in the system containing SrO. The Ca2PbO4 compound is formed first even in the system whereM=Ca+Sr. It is confirmed that Ca2PbO4 systems containing PbO.

Zusammenfassung

Zur Klärung des Einflusses von PbO-Zusatz bei der Bildung supra-leitender Phasen im System Bi2O3−SrO−CaO−CuO wurden unter nichtisothermen Bedingungen Feststoffreaktionen im System PbO−MO (M=Ca, Sr, Ca+Sr) untersucht.

Die Resultate zeigen, daß die Reaktivität der Komponenten in Systemen mit PbO und CaO viel höher liegt als in Systemen mit SrO. In den Systemen mitM=Ca+Sr wird zuerst die Verbindung Ca2PbO4 gebildet. Es wurde festgestellt, daß die Bildung von Ca2PbO4 einer der ersten Schritte ist, um in PbO-haltigen Systemen auf Bi-Basis die Hoch-T c -Phasen zu erhalten.

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Authors and Affiliations

  1. Institute of Physical Chemistry, Romanian Academy, 202 SPL. Independentei, 77208, Bucharest, Romania

    M. Zaharescu, A. Braileanu & D. Crisan

Authors
  1. M. Zaharescu
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  2. A. Braileanu
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  3. D. Crisan
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Zaharescu, M., Braileanu, A. & Crisan, D. Thermoanalytical study of the formation of compounds in the PbO−MO (M=Ca, Sr, Ca+Sr) system. Journal of Thermal Analysis 40, 321–327 (1993). https://doi.org/10.1007/BF02546582

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  • DOI: https://doi.org/10.1007/BF02546582

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