A New Method on High Temperature Superconductor Material Synthesis by Combination of MCA and SHS

机译：MCA和SHS相结合合成高温超导体材料的新方法

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The combination of mechano-chemical activation and self-propagating high-temperature synthesis (SHS) has been widened the possibilities for both methods. For YBCO systems the investigation showed that a short-term mechano-chemical activation of initial powders before SHS leads to single-phase and ultra-fine products. A new technique for preparing ultra fine high-temperature superconductor of YBCO composed with a grain size of d < 1 μm was developed. The specific feature of the technique was formed with the YBa_2Cu_3O_(7-δ) crystalline lattice directly from the X-ray amorphous state arising as a result of mechanical activation of the original oxide mixture. The technique allows the stage of formation of any intermediate reaction products to be ruled out. X-ray analysis and magnetic studies of ultra-fine high temperature superconductor (HTS) were carried out. Dimension effects associated with the microstructure peculiarities were revealed. A considerable enhancement of inter-grain critical currents was found to take place in the ultra-fine samples investigated.

机译：机械化学活化和自蔓延高温合成（SHS）的组合已拓宽了这两种方法的可能性。对于YBCO系统，研究表明，在SHS之前，初始粉末的短期机械化学活化会生成单相和超细产品。开发了一种新的制备粒径为d <1μm的YBCO超细高温超导体的新技术。该技术的特定特征是由YBa_2Cu_3O_（7-δ）晶格直接由原始氧化物混合物的机械活化产生的X射线非晶态形成的。该技术可以排除任何中间反应产物的形成阶段。进行了超细高温超导体（HTS）的X射线分析和磁性研究。揭示了与微观结构特性相关的尺寸效应。发现在研究的超细样品中，晶粒间的临界电流有了很大的提高。

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来源
《International Symposium on Magnetic Industry(ISMI'04) amp; International Symposium on Physics and IT Industry(ISPITI'04); 20041004-08; Shenyang(CN)》|2004年|P.156-159|共4页
会议地点 Shenyang(CN)
作者
Soh Deawha; Korobova N;
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Myongji University, Korea;

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原文格式 PDF
正文语种 eng
中图分类磁性材料、铁氧体;
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A New Method on High Temperature Superconductor Material Synthesis by Combination of MCA and SHS

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