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铅在Bi_(2-x)Pb_xSr_2Ca_2Cu_3O_y超导系中的最大固溶度在x=0.30～0.45范围内。但是,只有添加适量的铅才能促进高T_c相的形成,和改善其热稳定性。x=0.2的样品具有最佳超导性。当铅含量增加到x>O04时,超导性降低。冷轧加工在带材中形成〔001〕织构是带材J_c提高的主要原因
The maximum solubility of lead in the Bi_ (2-x) Pb_xSr_2Ca_2Cu_3O_y superconducting system is in the range of x = 0.30 ~ 0.45. However, only adding the proper amount of lead can promote the formation of high Tc phase and improve its thermal stability. Samples with x = 0.2 have the best superconductivity. When the lead content increases to x> O04, the superconductivity decreases. Cold-rolled sheet formed in the [001] texture is the main reason for the increase of the strip J_c