LZO covered Cu-based substrates

Behavior of oxygen diffusion in buffer layers for coated conductors

“…All precursor solution manipulations were carried out in ambient atmosphere. Details of their preparation processes can be found elsewhere [7][8][9][10][11][12][13][14]. The LZO precursor solution was firstly spin coated onto YSZ (0 0 l) single crystal substrates and short cube-textured NiW substrates of 1 cm × 1 cm in size at 2500 rpm for 30 s; followed by heat treatment at 900 • C for 1 h in a reducing forming gas atmosphere of Ar-4% H2.…”

“…The procedures, which La 2 Zr 2 O 7 (LZO) and CeO 2 textured thin films are prepared on YSZ (yttria-stabilized zirconia) (0 0 l) single crystal substrates and textured NiW substrates by MOD, are well controllable and rather mature [7][8][9][10][11][12][13][14][15]. In addition, there exists large difference between the intrinsic oxygen diffusion coefficient of LZO and that of CeO 2 [13,16].…”

Fluorine-free sol–gel preparation of YBa2Cu3O7−x superconducting films by a direct annealing process

“…The reaction can be expressed by formula (3)(4). (3)(4) Therefore, the resulted YBCO precursor solution should contain at least three kinds of complexes mentioned above, and more probably, these three complexes will inter-react each other to form more complex organic groups. Due to the complexation between the organic groups and metallic ions, this fluorine-free YBCO solution is stable with a shelf-life of more than 1 year.…”

“…Today, process optimization has made the superconducting coated conductors derived from solution routes almost be commercialized [3][4][5][6][7]. However, the conventional TFA-MOD process using full metal-TFA salts in the precursor solution (All-TFA solution) generates a large amount of HF gas during the pyrolysis step.…”