张胜楠,黄英健,马小波,崔利军,刘国庆,郑会玲,徐晓燕,焦高峰,李成山,冯建情,闫果,张平祥.CaCuO2颗粒尺寸对双粉法制备Bi系高温超导带材性能的影响[J].稀有金属材料与工程,2020,49(5):1469~1475.[ZHANG SHENGNAN,Yingjian Huang,Xiaobo Ma,Lijun Cui,Guoqing Liu,Huiling Zheng,Xiaoyan Xu,Gaofeng Jiao,Chengshan Li,Jianqing Feng,Guo Yan,Pingxiang Zhang.Influence of CaCuO2 particle size on the phase evolution of Bi-based high temperature superconductors based on Two-powders Route[J].Rare Metal Materials and Engineering,2020,49(5):1469~1475.]
CaCuO2颗粒尺寸对双粉法制备Bi系高温超导带材性能的影响
投稿时间:2018-11-22  修订日期:2018-12-11
中文关键词:  高温超导材料  Bi-2212  前驱体粉末  相演变动力学  微结构
基金项目:国家自然科学基金面上项目No.51472206; 国家热核聚变堆计划No.2013GB110001;国家重点研发计划No.2017YFB0902303
中文摘要:
      本文通过基于共沉淀工艺的双粉法制备了Bi1.76Pb0.34Sr1.93Ca2.0Cu3.06O8+d (Bi-2223)前驱体粉末。在这一过程中,首先单独制备了Bi1.76Pb0.34Sr1.93CaCu2.06O8+d (Bi-2212)和CaCuO2(实际相组成为Ca2CuO3和CuO)粉末,并分别进行了烧结。通过调节共沉淀工艺过程中的pH值,获得了颗粒尺寸不同的CaCuO2粉末,然后将Bi-2212与其按照相组成相组成为1:1进行混合,并装入Ag包套中,通过一系列的旋锻、拉拔和轧制工艺,获得设计尺寸的Bi-2223带材。比表面积测试表明随着pH值从3.0增加到5.0和6.5,获得CaCuO2粉末的平均颗粒尺寸从1.1减小到0.75和0.60 mm。通过扫描电镜对不同尺寸CaCuO2颗粒制备的Bi-2223生带、第一次热处理和后处理之后带材的相组成和分布进行了表征。结果表明,适当尺寸的CaCuO2颗粒可以避免团聚现象的出现,因此有利于高载流性能带材的获得。最终通过进一步调节带材的尺寸,1#带材的性能最高,达到了12200 Acm-2
Influence of CaCuO2 particle size on the phase evolution of Bi-based high temperature superconductors based on Two-powders Route
英文关键词:High temperature superconductor  Bi-2212  Precursor powder  Phase evolution dynamic  Microstructure
英文摘要:
      Bi1.76Pb0.34Sr1.93Ca2.0Cu3.06O8+d (Bi-2223) precursor powders were fabricated with a two-powder route based on co-precipitation process. During this process, Bi1.76Pb0.34Sr1.93CaCu2.06O8+d (Bi, Pb-2212) and CaCuO2 (with the actual phase composition of Ca2CuO3 and CuO) powders were first synthesized and calcinated separately, then mixed together before packed into Ag sheath. By tuning the pH values during the co-precipitation process, CaCuO2 powders with different average particle size of ~1.10, 0.75, and 0.60 mm were obtained, respectively. Then single filament Bi-2223/Ag tapes were fabricated by powder in tube (PIT) process with precursor powders obtained by mixing the different particle sized CaCuO2 powders and well-calcinated Bi-2212 powders. The influences of CaCuO2 particle size on microstructure, phase evolution dynamics and superconducting current capacity of sintered Bi-2223 tapes were systematically studied. Due to higher uniformity of Ca2CuO3 and CuO distribution in filaments, clustering of secondary phases and insufficiently reacted areas were effectively avoided. Therefore, higher current capacity of ~12200 Acm-2 was obtained on the 1# tape by further optimizing the final dimension of the tapes.
作者单位E-mail
张胜楠 西北有色金属研究院超导材料研究所 snzhang@c-nin.com 
黄英健   
马小波 西北有色金属研究院超导材料研究所  
崔利军   
刘国庆 西北有色金属研究院超导材料研究所  
郑会玲 西北有色金属研究院超导材料研究所  
徐晓燕 西北有色金属研究院超导材料研究所  
焦高峰 西北有色金属研究院超导材料研究所  
李成山 西北有色金属研究院超导材料研究所  
冯建情 西北有色金属研究院超导材料研究所  
闫果   
张平祥 西北有色金属研究院超导材料研究所  
摘要点击次数: 258
全文下载次数: 152
查看全文  查看/发表评论  
关闭