【作者】 李凤华； 樊占国； 杨中东； 徐克；

【Author】 LI Feng-hua FAN Zhan-guo YANG Zhong-dong XU Ke (School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China)

【机构】 东北大学材料与冶金学院；

【摘要】 采用粉末装管法(PIT)制备了 YBaCuO/Ag 包套复合带材．通过低氧分压熔融织构工艺降低 YBaCuO/Ag 带材的热处理温度至940℃,低于 Ag 的熔点961℃．YBaCuO/Ag 带材中氧化物芯在(001)方向稍有取向．在相同的热处理条件下,相对于溶胶凝胶法 (sol-gel)YBaCuO 粉末和固相反应法制备的150目 YBaCuO 粉末,固相反应法制备的250目(＜40μm) YBaCuO 粉末填充的带材样品临界点流密度 J_c 值较大．超导带越薄,样品的临界电流密度越大,250目粉末装管的 YBaCuO/Ag 带材吸氧100h 后 J_c 值达2392．3A/cm~2．更多还原

【Abstract】 YBaCuO/Ag tapes were prepared by powder-in-tube（PIT）method.Melting-texture-growth（MTG）progress under low oxygen partial pressure lowered post-treatment temperature of YBaCuO/Ag tapes down to 940℃ which was below 961℃ the melting point of Ag avoiding Ag melting and sticking to furnace.There existed orientation of oxide core in YBaCuO/Ag tape in the direction of（001）.Under the same treatment condition,tapes with YBa₂Cu₃O_7-δpowder whose particle size was 250 mesh（＜40μm）by solid reaction method possessed higher J_c value than those with size of 150 mesh by solid reaction method and tapes with sol-gel powder.Thinner tapes carried higher critical current density.The J_c value of the melting textured sample with 250 mesh powder in tube after 100h oxygenation reached 2392.3A/cm²（77K,OH）.更多还原