双粉法制备高性能Bi-2223/Ag多芯带材

稀有金属材料与工程, 1999, 28(3): 155-160.

双粉法制备高性能Bi-2223/Ag多芯带材

李成山 ^1, , 张平祥 ^2, , 王安康 ^3, , 郑会玲 ^4, , 吴怡芳 ^5, , 冯勇 ^6, , 奚正平 ^7, , 周廉 ^8,

1.西北有色金属研究院,西安,710016

2.西北有色金属研究院,西安,710016

3.西北有色金属研究院,西安,710016

4.西北有色金属研究院,西安,710016

5.西北有色金属研究院,西安,710016

6.西北有色金属研究院,西安,710016

7.西北有色金属研究院,西安,710016

8.西北有色金属研究院,西安,710016

关键词：双粉法 , Bi-2223/Ag带 , 相转变 , 道次加工率

High-Quality Bi-2223/Ag Multifilament Tapes Fabricated Using a Two-Powder Process

采用主相为2212+CaCuO2的所谓双粉作为前驱粉,用标准的粉末套管(PIT)工艺制备了37芯、61芯和85芯Bi-2223银包套多芯带材.研究发现:采用双粉装管缩短了2223成相时间,仅用40 h即获2223纯相.前驱粉中较大尺寸2212片状晶的存在有益于Ca,Cu传质和2223织构的提高.通过对加工工艺的精确控制,可有效防止芯丝的不均匀,清除妨碍长带制备的芯丝"香肠"状现象.首次实现了双粉法制备高性能的Bi-2223/Ag长带,长带性能的均匀性和重复性都有较好保证.所制备的0.24 mm×4 mm尺寸短样在77 K时Ic=53 A(Jc约为2.7×104 A/cm2),达国际先进水平,20 m长样Ic=35 A,并实现批量化生产.

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