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Journal
2006 | 4 | 1 | 166-173
Article title

Phase formation and microstructure in Re1-x
CaxBa2Cu3Oz (Re=Y, Eu, Er; x=0, 0.2, 0.3) superconducting ceramics

Content
Title variants
Languages of publication
EN
Abstracts
EN
We have investigated the influence of Ca-substitution and different rare earths on the microstructure of RE1-x
CaxBa2Cu3O7-δ
(RE= Y, Eu, Er; x=0, 0.2, 0.3) superconducting ceramics. Scanning electron microscopy, X-ray microanalysis and energy dispersive spectroscopy have been used to study the microstructure and the chemical composition of the samples. A correlation was established between the polycrystalline microstructure and phase formation depending on the additive content. We observed that calcium is distributed uniformly in the crystals. The formation of minor impurity phases improved the sintering conditions.
Publisher

Journal
Year
Volume
4
Issue
1
Pages
166-173
Physical description
Dates
published
1 - 3 - 2006
online
1 - 3 - 2006
Contributors
  • Institute of Solid State Physics, Bulgarian Academy of Science, 72 Tzarigradsko Chaussee Blvd., 1784, Sofia, Bulgaria, emangelina@issp.bas.bg
author
  • Institute of Solid State Physics, Bulgarian Academy of Science, 72 Tzarigradsko Chaussee Blvd., 1784, Sofia, Bulgaria
author
  • Department of Silicate Technology, University of Chemical Technology and Metallurgy, 8 Kl. Ohridski, 1756, Sofia, Bulgaria
author
  • Centre for Materials Research, Tallin Technical University, Ehitajate 5, Tallin, 19086, Estonia
author
  • Centre for Materials Research, Tallin Technical University, Ehitajate 5, Tallin, 19086, Estonia
  • Department of Silicate Technology, University of Chemical Technology and Metallurgy, 8 Kl. Ohridski, 1756, Sofia, Bulgaria
author
  • Institute of Solid State Physics, Bulgarian Academy of Science, 72 Tzarigradsko Chaussee Blvd., 1784, Sofia, Bulgaria
References
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  • [2] P. Starowicz, J. Sokolowski, M. Balanda and A. Szytula: “The effect of calcium substitution in deoxygenated R1-x CaxBa2Cu3O6.1systems (R=Y, Eu): appearance of superconductivity, insulator to metal transition”, Physica C, Vol. 363, (2001), pp. 80–90. http://dx.doi.org/10.1016/S0921-4534(01)00628-1[Crossref]
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  • [5] Shixun Cao, Lingwei Li, Fen Liu, Wenfeng Li, Changyun Chi, Chao Jing and Jincang Zhang: “Structure and charge transfer correlated with oxygen content for a Y0.8Ca0.2Ba2Cu3Oy (y=6.84-6.32) system: a positron study”, Supercond. Sci. Technol., Vol. 18, (2005), pp. 606–610. http://dx.doi.org/10.1088/0953-2048/18/5/005
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  • [7] S. Terzieva, A. Stoyanova-Ivanova, K. Zalamova, V. Mikli, Ch. Angelov and V. Kovachev: “Morphology of Y1Ba2Cu3Oz and Y0.7Ca0.3Ba2Cu3Oz bulk samples depending on Ca-subtitution”, J. Optoelectron. Adv. M., Vol. 7(1), (2005), pp. 477–480.
  • [8] L. Vladimirova, T. Nedeltcheva and A. Stoyanova-Ivanova: “Determination of oxygen stoichiometry in Y1-x CaxBa2Cu3Oy superconducting bulk samples”, J. Univ. Chem. Tech. Met., Vol. 38, (2003), pp. 955–956.
  • [9] A.K. Stoyanova-Ivanova, T.K. Nedeltcheva and L.K. Vladimirova: “Spectrophotometric determination of xygen content in calcium substitituted RBCO (R= Eu, Gd, Er) surerconductors”, Eur. J. Chem., Vol. 3(3), (2005), pp. 432–440.
  • [10] C.N.R. Rao, R. Nagarajan and R. Vijayaraghavan: “Synthesis of cuprate superconductors”, Supercond. Sci. Tech., Vol. 6, (1993), pp. 1–20. http://dx.doi.org/10.1088/0953-2048/6/1/001[Crossref]
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  • [12] R. Cloots, T. Koutzarova, J-P. Mathieu and M. Ausloos: “From Re-211 to Re-123. How to control the final microstructure of superconducting single-domains”, Supercond. Sci. Technol., Vol. 18, (2005), pp. 9–23. http://dx.doi.org/10.1088/0953-2048/18/3/R01[Crossref]
  • [13] Mehmet Sarikaya and B.L. Thiel: “Identification of Intergranular Cu2O in policristalline YBa2Cu3O7-x superconductors”, J. Am. Ceram. Soc., Vol. 71, (1988), pp. 305–309. http://dx.doi.org/10.1111/j.1151-2916.1988.tb05910.x[Crossref]
  • [14] Judiyh L. McManus-Driscoll: “Materials Chemisty and Thermodynamics of ReBa2Cu3O7-x ”, Adv. Mater., Vol. 9, (1997), pp. 457–473.
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_1007_s11532-005-0013-x
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