Method of manufacturing of insulated flat long-length second generation high-temperature superconducting wires and wire

A method of manufacturing a flat long-length second generation HTS wire comprising:

• (A) preparing an electrodeposition emulsion by mixing particles of P84 polyimide resin, a stabilizer chosen from the group comprising tertiary amines having a boiling point not exceeding 200° C., and an organic solvent chosen from the group consisting N-methylpyrrolidone and N,N-dimethylphormamide;
• stirring a mixture for a time necessary for a neutralization reaction between the polyimide and the stabilizer to occur to form an intermediate solution;
• forming the electrodeposition emulsion by adding a precipitating agent to the intermediate solution, the adding comprising first adding 50-60% of a total amount of the precipitating agent while stirring at a rate of 1000-3000 rpm, then adding the rest of the precipitating agent while stirring at a rate not exceeding 100 rpm;
• (B) electrodepositing the emulsion prepared at stage (A) onto an HTS wire in a deposition cathode cell by moving the HTS wire through the cell containing the emulsion and constantly stirring the emulsion by an inert gas flow while the HTS wire is in motion, wherein the cathode is at a negative potential and the HTS wire is at a positive potential, so that a voltage between the cathode and the HTS wire enables the deposition of polyimide particles onto the HTS wire;
• and
• (C) thermally treating the HTS wire surface by heating at a temperature not exceeding 200° C. to form an insulating film on the HTS wire.