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生物矿化法制备平片状YBCO粉末及导体

Synthesize YBCO Powder and Conductor by a Biomineral Method
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摘要 介绍了一种全新的制备YBCO超导粉末的方法,通过加入右旋糖酐采用生物矿化的方法,可以使制备的YBCO粉末晶粒均呈现出平片状,其典型尺寸为5μm×5μm×1μm,TEM显示这些平片状晶粒本身亦呈现层片状结构。同时在一定的区域内,这些平片状YBCO晶粒会自发聚集形成具有相似生长方向的晶粒簇。在这些晶粒簇内部首次在YBCO内部发现存在有自发超导连接现象。超导连接区域平均包含3~5个平片状晶粒。由于这种YBCO粉末具有特殊的微观结构,所以具有很好的超导性能,其Jc值在77K自场下达到了0.1MA·cm-2,比同等条件下的商业YBCO粉末高出10倍以上。用这种具有特殊结构的YBCO粉末可以制备出可以实际承载超导传输电流的YBCO导体,结果表明此方法有望成为一条全新且廉价又高效的制备YBCO导体的新路线。 a novel technique-biomimeral method to synthesize strong anisotropic platelike crystallites of YBa2Cu3O7-8 (YBCO) superconductor powders is presented. The typical size of obtained YBCO powder is 5μm × 5 μm× 1 μm. All these grains self assemble to region with local orientation, it allows the intergranular supereurrent pass along average 3 - 5 grains. TEM shows that every platelike grain expresses hierarchical structure. Due to this particular structure, the intra- granular critical current density reaches 0. 1 MA . cm-2 at 77 K and self field, which is 10 times higher than that of the commercial YBCO powder. A YBCO conductor fabricated by platelike YBCO powders can really allow supercurrent flow. The present work provides an important and new route for fabricating YBCO conductors which has the potential applications to solve the limitation existed in that traditional thin film approaches.
出处 《中国材料进展》 CAS CSCD 2013年第9期533-540,561,共9页 Materials China
基金 国家自然科学基金(51171002) 北京市自然科学基金(2132011) 高等学校博士学科点专项科研基金资助(20121103110012) 2013年度北京市自然科学基金重点项目B类(KZ201310005003) 北京市属高等学校创新团队建设与教师职业发展计划项目(IDHT20130510) 中央财政支持地方高校建设专项资金 211计划专项资金
关键词 YBCO粉末 生物矿化 平片晶粒 超导 YBCO powder biomimeral method platelike grain superconductor
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参考文献15

  • 1Pastor J Y,Poza P,Lorca J. Mechanical Properties of Textured Bi2Sr2CaCu2O8+delta High-Temperature Superconductors[J].{H}Journal of the American Ceramic Society,1999,(11):3139. 被引量:1
  • 2Zhang Z,Wimbush S C,Kursumovic A. Detailed Study of the Process of Biomimetic Formation of YBCO Platelets from Ni-trate Salts in the Presence of the Bio-Polymer Dextran and a Mol-ten Nacl Flux[J].{H}Crystal growth and design,2012.5635-5642. 被引量:1
  • 3Peterson R L. Magnetization of Anisotropic Superconducting Grains[J].{H}Journal of Applied Physics,1990.6930-6933. 被引量:1
  • 4Lehner T. Development of 2G HTS Wire for Demanding Electric Power Applications[M].Enermat-New Materials for Energy,2011. 被引量:1
  • 5Grant G T,Morris E R,Rees D A. Biological Interac-tions between Polysaccharides and Divalent Cations:the Egg-Box Model[J].{H}FEBS Letters,1973,(01):195-198. 被引量:1
  • 6Mann S. Biomineralization:Principles and Concepts in Bioinor-ganic Materials Chemistry[M].{H}New York:Oxford University Press,2001. 被引量:1
  • 7Yan M F. Ceramic SuperconductorsⅡ[M].Westerville:Ameri-can Ceramic Society,1988.169-176. 被引量:1
  • 8Zhang Z,Wimbush S C,Kursumovic A. Biopolymer Me-diated Synthesis of Plate-Like YBCO With Enhanced Intragranu-lar Critical Current and Grain Connectivity for Next Generation Superconducting Coated Conductors[J].{H}CRYSTENGCOMM,2012.5765-5770. 被引量:1
  • 9Walsh D,Wimbush S C,Hall S R. Use of the Polysaccharide Dex-tran as a Morphological Directing Agent in the Synthesis of High-Tc Superconducting YBa2 Cu3 O7-ΔSponges with Improved Critical Cur-rent Densities[J].{H}CHEMISTRY OF MATERIALS,2007.647-649. 被引量:1
  • 10Izumi T,Shiohara Y. R&D of Coated Conductors for Applications in Japan[J].{H}PHYSICA C,2010,(20):967-970. 被引量:1

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