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首页> 外文期刊>Physica, C. Superconductivity and its applications >Formation of Bi-2212 phase and phase assemblage in Ga-doped BSCCO system
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Formation of Bi-2212 phase and phase assemblage in Ga-doped BSCCO system

机译：掺Ga的BSCCO体系中Bi-2212相的形成和相组合

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摘要

Phase relations in the Bi-Sr-Ca-Cu-Ga-O system were investigated at 850 degree -900 degree C. Two Ga-containing phases were found to be compatible with Bi-2212. Compositions of these phases were estimated as Bi sub(0.2)Sr sub(1.8-x)Ca sub(x)Ga sub(2)O sub(z) and Bi sub(1.7)Sr sub(2.3)Ca sub(0.6)Cu sub(1.6)Ga sub(0.4)O sub(z). The Ga content in Bi-2212 was limited to 15-25 mol%. The mixture of Bi-2212 with the Ga-containing phases started to melt around 870 degree C, and at 890 degree C yields liquid and (Sr,Ca) sub(3)Ga sub(2)O sub(6) phase. The superconducting composites Bi-2212 /Bi sub(0.2)Sr sub(1.8-x)Ca sub(x)Ga sub(2)O sub(z) were prepared using partial melting procedure. The dopant had only a slight effect on T sub(c), the flux pinning in the material was not improved at all.
机译：研究了Bi-Sr-Ca-Cu-Ga-O-O体系在850度-900摄氏度下的相关系。发现两个含Ga的相与Bi-2212相容。这些相的组成估计为Bi sub（0.2）Sr sub（1.8-x）Ca sub（x）Ga sub（2）O sub（z）和Bi sub（1.7）Sr sub（2.3）Ca sub（0.6） Cusub（1.6）Gasub（0.4）Osub（z）。 Bi-2212中的Ga含量限制为15-25mol％。 Bi-2212与含Ga相的混合物在870摄氏度左右开始熔化，在890摄氏度下产生液相和（Sr，Ca）sub（3）Ga sub（2）O sub（6）相。采用部分熔融工艺制备了Bi-2212 / Bi sub（0.2）Sr sub（1.8-x）Ca sub（x）Ga sub（2）O sub（z）超导复合材料。掺杂剂对Tsub（c）的影响很小，根本没有改善材料中的磁通钉扎。

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