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Effect of Starting Materials and Heat Treatments on T1-Based High-Tc Superconductors

  • I. Kirschner
  • I. Halasz
  • Gy. Kovacs
  • T. Trager
  • T. Porjesz
  • G. Zsolt
  • J. Matrai
  • T. Karman
Conference paper

Abstract

Superconducting samples of the same nominal composition of TlCaBaCuO4.5±× have been prepared by the aid of different starting materials and heat treatments. They have the critical temperatures of 0 K (no zero resistivity), 106 K, 111 K, 121 K, 92 K and 105 K respectively. It has been stated the highest Tc belongs to the most crystallized and essentially single-phase structure. In the most cases the phase of Tl2CaBa2Cu2O8 is responsible for the superconductivity. Certain content of the T12Ca2Ba2Cu3OlO phase and some unidentified phases can also be found. A time-dependent character of some samples has been observed too.

Keywords

Heat Treatment Critical Temperature Contact Resistance Nominal Composition Heat Treatment Process 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Japan 1989

Authors and Affiliations

  • I. Kirschner
    • 1
  • I. Halasz
    • 2
  • Gy. Kovacs
    • 1
  • T. Trager
    • 3
  • T. Porjesz
    • 1
  • G. Zsolt
    • 1
  • J. Matrai
    • 3
  • T. Karman
    • 1
  1. 1.Dept for Low Temperature PhysicsRoland Eötvös UniversityBudapestHungary
  2. 2.Central Research Institute for ChemistryBudapestHungary
  3. 3.Central Research and Design Institute for Silicate IndustryBudapestHungary

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