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崔利军,张平祥,李金山,闫果,冯勇,刘向宏,李建峰,潘熙峰,张胜楠,马晓波,刘国庆.前驱粉粒度对Bi-2223带材微观结构和超导电性的影响研究[J].稀有金属材料与工程(英文),2018,47(9):2682~2686.[CUI Lijun,ZHANG Pingxiang,LI Jinshan,YAN Guo,FENG Yong,LIU Xianghong,LI Jianfeng,PAN Xifeng,ZHANG Shengnan,MA Xiaobo and LIU Guoqing.Microstructure and Superconducting of Bi-2223 Tape Prepared by Precursor Powder with Different Particle Size[J].Rare Metal Materials and Engineering,2018,47(9):2682~2686.]
Microstructure and Superconducting of Bi-2223 Tape Prepared by Precursor Powder with Different Particle Size
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Received:June 20, 2018  Revised:July 16, 2018
DOI:
Key words: precursor powder  particle size  Bi-2223  superconducting
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Author NameAffiliation
CUI Lijun,ZHANG Pingxiang,LI Jinshan,YAN Guo,FENG Yong,LIU Xianghong,LI Jianfeng,PAN Xifeng,ZHANG Shengnan,MA Xiaobo and LIU Guoqing  
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Abstract:
      The effects of particle size of precursor powder on microstructure and superconducting of Bi-2223 tape were investigated. Three kinds of precursor powders with different particle size (8μm, 2μm, <1μm) were prepared by spray pyrolysis method via adjusting the concentration of metal nitrates solution and ball milling. All powders were composed of Bi-2212, (Sr,Ca)<sub>x</sub>Cu<sub>y</sub>O<sub>d</sub> (AEC) and CuO phase after heat treatment. It was showed that AEC phase dimension and content increased with decreasing of particle size of precursor powders. However, the powder with average particle size of 2um had the minimal dimension and content of CuO phase. For 37-filaments Bi-2223 tapes fabricated by three kinds of precursor powders, the highest critical current (I<sub>c</sub>) was achieved for powder with average particle size of 2um, which had highest (Bi,Pb)<sub>3</sub>Sr<sub>2</sub>Ca<sub>2</sub>CuO<sub>x</sub>(Pb-3221) and lowest AEC phase compared to other tapes. The results showed that particle size of precursor powders mainly affected dimension and content of AEC and CuO phase, which further caused difference of I<sub>c</sub> and non-superconducting phases in Bi-2223 tape.