Microstructure and superconducting properties of MTG GdBaCuO bulk superconductor with doping fine Gd211 inclusion
Microstructure and superconducting properties of MTG GdBaCuO bulk superconductor with doping fine Gd211 inclusion
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DOI：
10.1088/1742-6596/234/1/012020
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发表时间：
2010-06
期刊：
影响因子：
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通讯作者：
Y. Jiao;L. Xiao;M. Zheng;Q Z Yan;K X Xu
中科院分区：
文献类型：
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作者：
Y. Jiao;L. Xiao;M. Zheng;Q Z Yan;K X Xu
采用熔融织构法在空气中制备了不同初始尺寸的Gd ~（211）掺杂的单畴GdBaCuO超导块材。采用Pechini法合成了精细的Gd 211相。与固相反应制备的Gd 211相相比，Gd 211相的尺寸和形状分布均匀。在77 K和自场条件下，采用Gd 211细粉作为起始粉，样品的临界电流密度达到5.3 × 104 A/cm ~ 2。这可以归因于大块超导体中捕获的Gd 211夹杂物的细化
Single domain GdBaCuO bulk superconductors have been fabricated by applying the melt-textured method with doping Gd211 particles of different initial sizes in air. The fine Gd211 phase was synthesized by Pechini method. Compared to Gd211 phase fabricated by solid state reaction, the distribution of the size and shape of the fine Gd211 particles is homogenous. The enhancement of critical current density has been observed for the sample with the employment of fine Gd211 starting powder, in which Jc has reached 5.3 × 104 A/cm2 at 77 K and self-field. This can be ascribed to the refinement of Gd211 inclusions trapped in bulk superconductors