双种子GdBCO超导体批量与缓冲器的性能通过修改TSMG方法
Yufeng Zhang1,2, Chunyan Li1, Ziwei Lou1
1College of Mathematics and Physics, Shanghai University of Electric Power, Shanghai 201306, China.
Micromachines
|May 27, 2023
概括
这项研究通过引入缓冲层,增强被困磁场和临界电流密度 (Jc) 来改善大规模的稀土铜氧化物 (REBCO) 超导散体. 与 (100/100) (SA) 相比, (110/110) 种子排列 (SB) 显示出更好的超导性能.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 超导电性 超导电性 超导电性
背景情况:
- 大尺寸的REBCO超导体散体对于应用至关重要,但由于多种植的谷物界限,其性能受损.
- 在REBCO散装制造中使用顶部种子融纹理增长 (TSMG) 方法.
- 改善大型REBCO散体中的超导特性仍然是一个重大挑战.
研究的目的:
- 通过减轻粒度边界效应,增强GdBCO散体的超导性能.
- 调查缓冲层和种子晶体排列对GdBCO散装的性能的影响.
- 为了优化制造过程使用YBa2Cu3O7-x (Y123) 作为液相源.
主要方法:
- 经过修改的TSMG方法用于生长GdBCO批量与缓冲层 (25毫米直径,12毫米厚度).
- 两个种子晶体排列 (100/100) (SA) 和 (110/110) (SB),使用了12毫米的距离.
- 使用YBa2Cu3O7-x (Y123) 作为液相源来影响Gd溶液度和Gd211粒子特性.
主要成果:
- 带有缓冲层的GdBCO批量表现出更好的超导特性,被困场显示了两个峰值.
- 大量SB ((110/110) 排列) 显示出卓越的性能,达到0.35 T和0.29 T的最大被困场,与SA相比,在磁场中具有更高的Jc值.
- 临界过渡温度仍然很高 (94-96 K),SB显示出明显的第二峰值效应,归因于Gd/Ba替换.
结论:
- 引入缓冲层和 (110/110) 种子安排有效地改善了GdBCO散装的被困场和临界电流密度 (Jc).
- 液相源Y123通过影响Gd溶解物度和Gd211颗粒大小,在优化Jc方面发挥了作用.
- 与SA相比,SB的总体超导性能更好,因为其残留和杂质相较少.
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