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Processability and metallurgical reactions during sintering in YBCO-PbS superconductors

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Abstract

The YBCO-PbS superconductors have some interesting features, like better normal state and superconducting properties and enhanced shielding action towards magnetic fields. Present paper reports on the thermoanalytical and X-ray diffraction studies on these materials. The studies indicate that PbS addition enhances the synthesis of Y-123 Phase and lowers the temperature of partial melting of this phase which helps in reducing the voids. The metallurgical reaction occuring in sintering of PbS doped YBCO superconductors has been investigated and in light of the findings an explanation is given for the improved properties of these materials.

Zusammenfassung

YBCO-PbS Supraleiter verfügen über einige interessante Eigenschaften, wie zum Beispiel bessere Eigenschaften im normalen als auch supraleitenden Zustand und eine erhöhte Abschirmungsaktivität gegenüber magnetischen Feldern. Vorliegender Beitrag berichtet über thermoanalytische und Röntgendiffraktionsuntersuchungen an diesen Materialien. Die Untersuchungen zeigen, daß der Zusatz von PbS die Bildung der Y-123-Phase steigert und die Temperatur von partiellem Schmelzen dieser Phase herabsetzt, was Hohlräume mindert. Die metallurgische Reaktion beim Sintern von mit PbS versetztem YBCO Supraleiter wurde untersucht und angesichts der Ergebnisse eine Erklärung für die verbesserten Eigenschaften dieser Materialien gegeben.

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Tyagi, A.K., Sharma, T.P. & Shahi, K. Processability and metallurgical reactions during sintering in YBCO-PbS superconductors. Journal of Thermal Analysis 44, 755–764 (1995). https://doi.org/10.1007/BF02547262

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  • DOI: https://doi.org/10.1007/BF02547262

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