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张胜楠,李成山,冯建情,徐晓燕,郝清滨,张平祥.增强芯丝密度对Bi-2212高温超导带材性能的影响[J].稀有金属材料与工程(英文),2018,47(1):47~51.[ZHANG SHENGNAN,LI Chengshan,FENG Jianqing,XU Xiaoyan,HAO Qingbin,ZHANG Pingxiang.Density enhancement for the fabrication of Bi-2212 superconducting tapes[J].Rare Metal Materials and Engineering,2018,47(1):47~51.]
Density enhancement for the fabrication of Bi-2212 superconducting tapes
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Received:November 03, 2016  Revised:December 16, 2016
Key words: High temperature superconductor  Bi-2212  filling density  critical current density  
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliationE-mail
ZHANG SHENGNAN Northwest Institute of Non-ferrous Metal Research snzhang@c-nin.com 
LI Chengshan 西北有色金属研究院  
FENG Jianqing 西北有色金属研究院  
XU Xiaoyan 西北有色金属研究院  
HAO Qingbin 西北有色金属研究院  
ZHANG Pingxiang 西北有色金属研究院  
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      Bi2.1Sr1.96CaCu2.0O8+d (Bi-2212) precursor powders were synthesized with co-precipitation process, and Bi-2212 single filament tapes were fabricated with powder-in-tube (PIT) technique. Based on SEM observation, the primary grain size of Bi-2212 precursor powders was 3~5 mm. However, after sintering, Bi-2212 grains clustered together and the particle size distribution became quite wide, from 10 mm to over 180 mm. By dividing the particles into four groups with different average particle size, the influences of average particle size on the filament density, microstructures and current capacity of final Bi-2212 tapes were systematically investigated. It was observed that with the decrease of particle size, the filament density increased over the entire cold-working process and heat treatment process. Therefore, the intergrain connection was enhanced, which lead to the obvious increase of current capacity