Study of Ag Addition to YBa₂Cu₃O_7-x Films Prepared using Electrophoretic Deposition

Abstract

Ag addition to YBa2Cu3O7-x superconducting films prepared using electrophoretic deposition on Cu substrates was investigated. The electrical characteristics of the films, such as zero-resistance temperature (T c), critical current density (J c), and resistivity at room temperature (ρ) were greatly improved by Ag doping. The T c of 94 K was attained with the electrophoretic Ag-doped film on Cu substrate. By doping with Ag, the grain growth was enhanced but no shift in YBa2Cu3O7-x peaks was observed in X-ray diffraction patterns. From the electron probe microanalysis of the sample cross section, the doped Ag was found to exist in the region devoid of YBa2Cu3O7-x grains.

YBa2Cu3O7−x dispersion in iodine acetone for electrophoretic deposition: Surface charging mechanism in a halogenated organic media

“…acetone [10,12,[19][20][21][22][23][24][25][26][27][28][29][30][31][32], isobutylmethylketone [11], propanol and butanol [31,32], acetone being the most used solvent. In acetone, a negative value of zeta potential for 0.01 g/l YBCO suspensions have been determined by Koura et al [20], while more concentrated suspensions promote a positive surface charge, leading to cathodic deposition [12, 21-35, 31, 32].…”

Optimization of the electrophoretic deposition of YBa2Cu3O7?x superconducting large area coatings

“…In * To whom correspondence should be addressed recent years electrophoretic deposition of high To superconductors has been studied intensively [3][4][5][6][7][8][9][10][11]. This technique has the advantage of producing economically uniform and dense coatings with controllable thickness on various substrates with different shapes and sizes and can easily be adapted to large area and continuous fabrication [12].The optimization and scale up an of earlier developed electrophoretic deposition technique [13][14] is investigated in this paper and is applied to large area substrates of several cm 2. Different parameters affecting the electrophoretic velocity have been investigated in detail in order to increase the deposition rate, the uniformity and density of the coatings, keeping the correct stoichiometry of YBa2Cu3OT-x(X=0.1-0.2) (YBCO).…”

J c enhancement of electrophoretically deposited YBa2Cu3O7−δ superconducting wire by BaF2 addition

“…Electrophoretic ͑electrophysical͒ deposition [1][2][3][4][5][6][7][8][9][10][11][12][13] is an effective technique to deposit YBa 2 Cu 3 O 7Ϫ␦ ͑YBCO͒ on an irregularly shaped substrate with a simple setup. Many groups have studied this method with various metal substrates ͑Ag, 1-8 Au, 7 Pt, 7 Cu, 9,10 Ni,7,8 Ni-Cr, 7 Kanthal, 7 stainless steel 12 12 and ZrO 2 /stainless steel 12 ͒.…”