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采用粉末装管加工技术(Powder-in-tube technique)制备了BiPbSrCaCuO/Ag(2223)复合高温超导带材。研究了冷加工工艺及热处理(烧结)工艺对带材微观结构和临界电流密度的影响。带材的微观结构和临界电流密度Jc值与冷加工变形量和烧结条件密切相关。拉拔、轧制的带材经单向压缩后Jc值显著提高。合理的烧结条件为:温度840～850℃,时间100～200h,冷却速率50～100℃/h。零磁场、77.3K下带材的最高临界电流密度Jc值为1.33×10~4A/m~2。
BiPbSrCaCuO / Ag (2223) composite high temperature superconducting tapes were prepared by powder-in-tube technique. The effects of cold working and heat treatment (sintering) on the microstructure and critical current density of the strip were studied. The microstructure and critical current density Jc of strip are closely related to the amount of cold working deformation and sintering conditions. The drawn and rolled strip significantly increased Jc after unidirectional compression. Reasonable sintering conditions: temperature 840 ~ 850 ℃, time 100 ~ 200h, cooling rate 50 ~ 100 ℃ / h. Zero magnetic field, 77.3K under the highest critical current density Jc value of 1.33 × 10 ~ 4A / m ~ 2.