G. Aldica et al., SINTERING TIME AND PROPERTIES OF YBA2CU3O-SIMILAR-TO-7 SUPERCONDUCTING CERAMICS, Journal of superconductivity, 8(3), 1995, pp. 365-372
The effect of annealing duration in oxygen flow on the superconducting
characteristics of YBa2Cu3Osimilar to 7 bulk ceramics was investigate
d by structural, electrical, magnetic, and electronic microscopy inves
tigations. The long-time annealing is deleterious for the superconduct
ivity in YBa2Cu3Osimilar to 7 ceramics. The optimum time interval for
annealing is from 20 to 70 h at 950 degrees C, and within this range t
he maximum value of T-c is obtained.