PREPARATION OF THE SUPERCONDUCTING OXIDES MAGNETIC SHIELDING BY USINGTHE ELECTROPHORETIC DEPOSITION METHOD

The preparation of high-T-c superconducting magnetic shielding by the electrophoretic deposition method has been investigated. The calcined YBCO powder was suspended in an acetone bath, and was deposited on var ious cylindrical substrates of silver, stainless steel, ceramics and p ermalloy. The sample deposited with oxides particles was sintered at 9 20 degrees C for 1h, and then annealed at 500 degrees C for 1h. The ma gnetic attenuation ratio (H-in/H-ex) was measured at 77 K. All samples with silver, stainless steel, ceramics, or permalloy substrate were a ble to shield the ambient magnetism (0.5 Oe) at least. The magnetic sh ield on a silver substrate with the diameter of 15 mm and length of 30 mm had the attenuation ratio of 5.1 X 10(-4) at 7.6 Oe.