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前驅(qū)粉粒度對Bi-2223帶材微觀結(jié)構(gòu)和超導(dǎo)電性的影響研究
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西北工業(yè)大學(xué),,西北工業(yè)大學(xué),西部超導(dǎo)材料科技股份有限公司,西部超導(dǎo)材料科技股份有限公司,西部超導(dǎo)材料科技股份有限公司,西部超導(dǎo)材料科技股份有限公司,西部超導(dǎo)材料科技股份有限公司,西北有色金屬研究院,西北有色金屬研究院,西北有色金屬研究院

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Microstructure and Superconducting of Bi-2223 Tape Prepared by Precursor Powder with Different Particle Size
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Northwestern Polytechnical University,,,,,,,,,,

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    摘要:

    本文主要研究了前驅(qū)粉粒度對Bi-2223帶材微觀結(jié)構(gòu)和超導(dǎo)電性的影響。通過調(diào)整溶液濃度和機(jī)械球磨,采用噴霧熱分解方法制備了三種不同粒度的前驅(qū)粉(7um,2um,<1um)。三種粒度的前驅(qū)粉經(jīng)熱處理后的相組分均為Bi-2212,(Sr,Ca)<sub>x</sub>Cu<sub>y</sub>O<sub>d</sub> (AEC)和CuO。研究發(fā)現(xiàn),AEC相的尺寸和含量均隨著前驅(qū)粉粒度的減小而增加。在平均粒度為2um的前驅(qū)粉中,CuO相的含量和大小均為最小。采用這三種不同粒度的前驅(qū)粉制備的37芯帶材,前驅(qū)粉平均粒度為2um的帶材具有最高的臨界電流,同時相對于另外兩根帶材,該帶材中有最高的Pb-3221相和最少的AEC含量。研究結(jié)果表明,前驅(qū)粉粒度的大小主要影響了前驅(qū)粉中AEC和CuO兩種相的大小和含量,進(jìn)而導(dǎo)致了所制備帶材的臨界電流及芯絲中非超導(dǎo)相的變化。

    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.

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崔利軍,張平祥,李金山,閆果,馮勇,劉向宏,李建峰,潘熙峰,張勝楠,馬曉波,劉國慶.前驅(qū)粉粒度對Bi-2223帶材微觀結(jié)構(gòu)和超導(dǎo)電性的影響研究[J].稀有金屬材料與工程,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, 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.]
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  • 收稿日期:2018-06-20
  • 最后修改日期:2018-07-16
  • 錄用日期:2018-07-18
  • 在線發(fā)布日期: 2018-11-01
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