应用化学 ›› 1990, Vol. 0 ›› Issue (3): 43-46.

• 研究论文 • 上一篇    下一篇

银对提高YBa2Cu3O7-y超导体临界电流密度Jc的作用

任玉芳, 孟建, 牛满志   

  1. 中国科学院长春应用化学研究所 长春 130022
  • 收稿日期:1989-08-01 修回日期:1989-12-08 出版日期:1990-06-10 发布日期:1990-06-10
  • 基金资助:
    国家自然科学基金

EFFECT OF SILVER ON THE ENHANCEMENT OF Jc IN YBa2Cu3O7-YSUPERCONDUCTOR

Ren Yufang, Meng Jian, Niu Manzhi   

  1. Changchun Institute of Applied Chemistry, Academia Sinica, Changchun, 130022
  • Received:1989-08-01 Revised:1989-12-08 Published:1990-06-10 Online:1990-06-10

摘要: 对YBa2Cu3O7-y:Agx超导体的性质进行了研究。该体系有较低的正常态电阻。XRD分析表明,在x<0.2时,该体系为正交结构。随Ag含量的增加,123相的α轴与b轴无明显改变,而c轴增加。X=1.5时,c轴增加了0.33%,表明有部分Ag进入123相晶胞。SEM研究表明,YBa2Cu3O7-y:Agx超导体晶粒细化均匀,晶粒间形成网状结构,改善了弱连接,使其临界电流密度Jc从50A/cm2提高到572A/cm2

关键词: YBa2Cu3O7-y:Agx, 超导体,

Abstract: The structure and properties of YBa2Cu3O7-y:Agx superconductor have been studied. Thesystem showed lower normal state resistivity and better ductility.XRD analysis showed thatthe system remains orthorhombic structure when the content of silver x<2.0.Increase of Agdid not change the a and b axes but substantially expanded in the c axis about 0.33% atx=1.5. This indicates that the silver has partly enter into the lattice cell of 123 phase.YBa2Cu3O7-y:Agx exhibits fine grains and net framework improving the weak-link in it inSEM. The critical current density is enhanced from 50A/cm2 to 572A/cm2.

Key words: YBa2Cu3O7-y Agx, superconductor, silver