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http://dx.doi.org/10.4313/JKEM.2015.28.7.450

Development of Large-sized YBCO High Temperature Superconductor Bulk Magnets and Actuator  

Han, Sang-Chul (Future Technology Research Laboratory, Korea Electric Power Research Institute)
Park, Byung-Jun (Future Technology Research Laboratory, Korea Electric Power Research Institute)
Jung, Se-Yong (Future Technology Research Laboratory, Korea Electric Power Research Institute)
Han, Young-Hee (Future Technology Research Laboratory, Korea Electric Power Research Institute)
Lee, Jong-Won (Department of Advanced Materials Engineering, Hanbat National University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.28, no.7, 2015 , pp. 450-455 More about this Journal
Abstract
For the practical application of a YBCO superconductor bulk, the superconductor bulk magnet with high magnetic field on a large area surface should be fabricated. To make this, YBCO single crystal bulks with fine $Y_2BaCuO_5$(Y211) particles have been prepared by the top-seed melt growth(TSMG) method with $YBa_2Cu_3O_x$, $Y_2O_3$, and $CeO_2$ mixing precursor. By using $Y_2O_3$ instead of $Y_2BaCuO_5$ as precursor, the manufacturing process became simpler and more economical. The microstructures, trapped field and critical current density of the various conditioned YBCO bulks have been observed, analyzed and measured. The different characteristic values of the several samples have been analyzed from the viewpoint of their microstructures. We have developed a $8{\times}12cm$ size superconductor bulk magnet, up to 3 T class, by using the 4 T class-high field superconducting magnetizer and confirmed the applicability of the transmission level circuit breakers by measuring the strength and speed of the superconductor bulk magnet actuator.
Keywords
$YBa_2Cu_3O_x$; Single crystal; Superconductor bulk magnet;
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