Abstract
Solid state reactions are the most commonly employed processes for the preparation of high-Tc superconducting ceramic oxides. However, there has been considerable effort expended to prepare the YBa2Cu3O7-δ (1-2-3) superconductor by low-temperature solution methods in order to obtain a more homogeneous oxide mixture resulting in products with superior superconducting properties. Proper processing of the precursors resulting in less preparation time, lower temperature of firing, higher critical current density, higher flux expulsion, etc., is expected.Our laboratory has been preparing low-temperature precursors by sol-gel and other methods. We employed the same methods for the preparation of 1-2-3 superconductors. The precursors were heated at 925°C for 12 hours in flowing oxygen. The resulting powder was found to be superconducting at 92.3K. Superconducting properties were measured by resistivity and impedance measurements.
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Schedule a callMore From: Proceedings, annual meeting, Electron Microscopy Society of America
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