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Elsevier, Physica C: Superconductivity and its Applications, 1(324), p. 30-38

DOI: 10.1016/s0921-4534(99)00444-x

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Formation of Bi-2212 phase and phase assemblage in Ga-doped BSCCO system

Journal article published in 1999 by P. E. Kazin ORCID, V. V. Poltavets, O. N. Poltavets, A. A. Kovalevsky, Y.-U. D. Tretyakov, M. Jansen
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

Phase relations in the Bi–Sr–Ca–Cu–Ga–O system were investigated at 850°–900°C. Two Ga-containing phases were found to be compatible with Bi-2212. Compositions of these phases were estimated as Bi0.2Sr1.8−xCaxGa2Oz and Bi1.7Sr2.3Ca0.6Cu1.6Ga0.4Oz. 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°C, and at 890°C yields liquid and (Sr,Ca)3Ga2O6 phase. The superconducting composites Bi-2212/Bi0.2Sr1.8−xCaxGa2Oz were prepared using partial melting procedure. The dopant had only a slight effect on Tc, the flux pinning in the material was not improved at all.