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2009年2月18日 申先生講演会

2012/03/26(Mon) 11:00


日時:2月18日(水)16:00 から 18:00

場所:強磁場超伝導材料研究センター 会議室

講師:申 亨燮(韓国・安東大学 教授)

題目:Activities of the Electro-Mechanical Property Evaluation
    of HTS Superconducting Tapes at ANU

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要旨:Development of new industrial technologies like superconductivity will play a major role in addressing problems regarding the proper management and efficient use of the world’s energy resources. In the past years, superconductivity technologies have been making remarkable progress, and it is expected that the new superconductivity industry will appear in the very near future in various industrial fields. From the discovery of High Temperature Superconductivity in 1986, high temperature superconductor (HTS) compounds have offered new and exciting possibilities for power applications at 77 K. Unfortunately, the industrialization and commercialization of these HTS materials have still not yet been realized due to issues including low critical current density (Jc), critical magnetic field (Hc), and critical temperature (Tc), as well as other application issues including AC losses, critical tolerance strain (εc), cooling method/cost, reliability, availability in long lengths, material cost, stability, etc. For large-scale industrial applications of HTS materials such as cables, coils and transformers, the expected mechanical loads are needed to be evaluated at the design stage. And therefore, the effect of mechanical strain on the HTS material should be understood. Mechanical strain is not a fundamental parameter to achieve superconductivity, but its importance can be seen when the superconducting material is used for device applications. The critical current, Ic, in the superconductor depends sensitively on the different stresses/strains induced during fabrication/operation, and that just a little mechanical strain can cause a large drop in the current carried by HTS materials. Activities of ANU group in Korea regarding especially to the electro-mechanical properties evaluation and reliability assessment of HTS superconducting tapes will be addressed at the seminar, including the introduction of the Development of Advanced Power system by Applied Superconducting technologies (DAPAS) program of the Center for Applied Superconductivity Technology under the 21st Century Frontier R & D Program in Korea.