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Preparation of Y2Ba4Cu7O15-δ Superconductor without High Oxygen Pressure
Authors:Ju-Chun Huang  Chien Hong Cheng  Shyang Roeng Sheen  Zhi Ling Lee  Chien Ming Lei  Maw Kuen Wu
Abstract:The synthesis of bulk Y2Ba4Cu7O15-δ superconductor at atmospheric oxygen pressure via solid state sintering is reported. Temperature ranging from 860 to 890 °C as well as time interval over 2 to 15 days were used to investigate the formation of the Y2Ba4Cu7O15-δ phase. A time-temperature profile characterizing the conditions for the preparation of Y2Ba4Cu7O15-δ phase suggests the optimal condition to be sintering at 890 °C for over 10 days. Detailed results of X-ray diffraction, electrical resistivity, iodometric titration and magnetization measurements are described.
Keywords:Y2Ba4Cu7O15-δ    Ambient oxygen pressure  Solid state reaction
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