Abstract
Microstructure and Properties of Y-123/Y-211 Bulk Superconductors with BaCeO3 and BaO2 Addition K. Zmorayova∗, V. Antal, M. Radusovska, S. Piovarci, D. Volochova and P. Diko Institute of Experimental Physics SAS, Watsonova 47, 040 01 Kosice, Slovak Republic YBa2Cu3O7−δ (YBCO) bulk single-grain superconductors were prepared by a TSMG process. CeO2, BaCeO3 and BaO2 powders were added to nominal composition Y1.5Ba2Cu3O7 with the aim to re ne Y2BaCuO5 (Y211) secondary particles. Added powders were re ned by milling in a friction milling and characterized by X-ray powder difractometry. Thermal properties of the systems were characterized by DTA. Microstructure of samples was studied by PLM. Successful re nement of Y-211 particles size was con rmed by IP measurements. Transition temperatures and eld dependences of the magnetic moment for further determination of the critical current densities were obtained using a VSM.
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