The design technology of high magnetic levitation YBaCuO superconducting bulk material can be immediately applied to superconducting power devices. In order to remove defects such as pores and cracks in the crystal when producing a superconducting bulk magnet and to improve the mechanical and electrical properties of the superconductor, a Y1.6Ba2.3Cu3.3O7-y superconducting bulk magnet with artificial holes was produced using SmBa2Cu3O7-y as a seed and introduced with artificial holes. In addition, the pores are reduced due to the pores, and unlike the bulk without holes, the surface area that supplies oxygen is increased during the oxygen annealing process, and in the structure of the bulk without holes, it is difficult for oxygen to bind to the interior, but through the surface area exposed by the artificial holes, it is easy to bind to oxygen and thus has a structure in which superconductivity is enhanced. This shows that the maximum magnetic levitation force of the bulk without artificial holes of 40 mm size is 45.95 N and that of the bulk with artificial holes is 116.228 N, which shows that the magnetic levitation force increases by 33% due to the nine artificial holes. After creating the artificial holes, the empty holes are bonded with BiPdCd alloy to transmit the physical impact, thereby reinforcing the insufficient mechanical strength. Through this process, it is possible to enhance the durability of the Y1.6Ba2.3Cu3.3O7-y superconducting bulk magnet by dispersing the physical impact exposed to the artificial holes. This research was supported by Korea Electric Power(Grant number: R22XO05-01).

Keywords: superconducting bulk, artificial hole, spike structure