制备参数对改进共沉淀法制备Bi-2212粉末的影响  

Influences of fabrication parameters on Bi- 2212 precursor powders with modified co- precipitation process

作　　者：刘国庆[1] 郝清滨[1] 郑会玲[1] 焦高峰[1] 徐晓燕[1] 马小波[1] 崔利军[2] 张胜楠[1] 李成山[1] 

机构地区：[1]西北有色金属研究院,西安710016 [2]西部超导材料科技股份有限公司,西安710018

出　　处：《低温与超导》2016年第2期1-4,共4页Cryogenics and Superconductivity

基　　金：国家"973"计划(2011CBA00104);ITER计划(2013GB110001)

摘　　要：实验采用改进共沉淀法制备了Bi-2212粉末,选用乙醇作为主要溶剂,通过对共沉淀过程金属离子溶液滴加速度、氨水滴加速度、溶液p H值、陈化温度以及时间的控制,最终获得成分均匀、颗粒细小、粒度均匀、符合原始配比的前驱粉末,采用该方法制备的前驱粉末制备的Bi-2212线材的超导电性达到了较高水平,在4.2K,自场条件下,同牛津公司制备线材性能接近。Modified co- precipitation method was adopted for the fabrication of Bi -2212 precursor powders, during which process alcohol was be used as solvent instead of water. By carefully controlling the titration speed of metallic ion solution and NH3 · H2O, pH value of the solution, and both the temperature and time of aging process, precursor powders with high chemical composition uniformity, fine granularity and narrow particle size distribution were obtained. High - performance multi - filamentary strand was fabricated with these powders. The engineering critical current at 4.2K and self field was similar to that obtained by oxford company.

关 键 词：固相混合 高场磁体 原子配比 

分 类 号：TQ426.6[化学工程]