Magnetic shielding performances of YBa2Cu3O7−δ -coated silver tubes obtained by electrophoretic deposition

摘要

We report a complete procedure to achieve multilayer YBCO thick films byelectrophoretic deposition on silver tubes using a suspension of YBCO powder in butanol. Withthe aim to optimize the magnetic shielding performances of the coatings, we have carried out anextensive investigation of the influence of the deposition parameters, the multilayer depositionsequence and the intermediate/final heat treatments on the coating microstructure. Using theoptimized conditions, a 24-layer YBCO coating has been successfully prepared on an 80 mmlong Ag tube: the melt growth processed multilayered YBCO thick film thus obtained can shieldan applied magnetic field of 1.9 mT at 77 K, the highest value per thickness unit reported so farin the literature for these materials.