PREPARATION OF TB(S)CCO SUPERCONDUCTOR COATING BY ELECTROPHORETIC DEPOSITION METHOD

The preparation of Tl2Ba2Ca2Cu3O10+x (TBCCO) superconducting oxide coa ting on Ag wire by the electrophoretic deposition method was investiga ted. Because it was the TBCCO powder is chemically stable in cyclohexa none, and a cyclohexanone bath (20 ml cyclohexanone+2.0 mg iodine+0.4g TBCCO powder) was used. The deposited sample dried by hot air was sin tered at 785 degrees C for 10 min in Tl atmosphere, and T-c,T-zero was 104 K. The superconductivity of the Tl2Ba1.6Sr0.4Ca2Cu3O10+x (TBSCCO) coating was improved if the deposited sample was completely covered w ith a large quantity of TBSCCO powder to control the evaporation of Tl from the sample. When the sample was sintered at 815 degrees C for 6 h, a uniform and approximately single high-T-c phase coating was obtai ned with a T-c,T-zero of 113 K.