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STRUCTURE AND SUPERCONDUCTIVITY OF BISMUTH-(LEAD)-CALCIUM-STRONTIUM-COPPER-OXYGEN CERAMICS PROCESSED BY ARC MELTING.

Author(s) : ALDICA G.

Type of article: Article

Summary

THESE CERAMICS OF TYPICAL CATION COMPOSITION PRESINTERED AT 1,073 K (800 DEG C), ARE FORMED BY ARC MELTING AND RAPIDLY COOLING THE 2021 SUPERCONDUCTING PHASE, COPPER OXIDE, AND CALCIUM OXIDE. THE ARC-MELTED SAMPLES SINTERED IN AIR AT 1,113 K (840 DEG C) EXHIBIT A SOLID-STATE STRUCTURAL TRANSFORMATION AND A MIXTURE OF 2122 AND 2223 SUPERCONDUCTING PHASES. WHEN THE ARC MELTING IS USED A SIGNIFICANT INCREASE IN DENSITY (FROM 3.7 TO 5.7G/CM3 ) AND IN CRITICAL CURRENT DENSITY (FROM 28 TO 60 A/CM2 IN ZERO FIELD AND AT 77 K) IS OBSERVED, WHILE THE CRITICAL TEMPERATURE REMAINS UNCHANGED.

Details

  • Original title: STRUCTURE AND SUPERCONDUCTIVITY OF BISMUTH-(LEAD)-CALCIUM-STRONTIUM-COPPER-OXYGEN CERAMICS PROCESSED BY ARC MELTING.
  • Record ID : 1991-0524
  • Languages: English
  • Source: J. Supercond. - vol. 2 - n. 4
  • Publication date: 1989/12
  • Document available for consultation in the library of the IIR headquarters only.

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