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2006 | 4 | 1 | 166-173
Tytuł artykułu

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

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
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.
Wydawca

Czasopismo
Rocznik
Tom
4
Numer
1
Strony
166-173
Opis fizyczny
Daty
wydano
2006-03-01
online
2006-03-01
Twórcy
  • Institute of Solid State Physics, Bulgarian Academy of Science, 72 Tzarigradsko Chaussee Blvd., 1784, Sofia, Bulgaria, emangelina@issp.bas.bg
  • Institute of Solid State Physics, Bulgarian Academy of Science, 72 Tzarigradsko Chaussee Blvd., 1784, Sofia, Bulgaria
autor
  • Department of Silicate Technology, University of Chemical Technology and Metallurgy, 8 Kl. Ohridski, 1756, Sofia, Bulgaria
autor
  • Centre for Materials Research, Tallin Technical University, Ehitajate 5, Tallin, 19086, Estonia
autor
  • 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
  • Institute of Solid State Physics, Bulgarian Academy of Science, 72 Tzarigradsko Chaussee Blvd., 1784, Sofia, Bulgaria
Bibliografia
  • [1] K. Hatada and H. Shimizu: “Structural and superconducting properties of R1-x CaxBa2Cu3O6+δ (R=Y, Er, Gd, Eu; 0 < δ < 1)”, Physica C, Vol. 304, (1998), pp. 89–95. http://dx.doi.org/10.1016/S0921-4534(98)00281-0
  • [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]
  • [3] R.J. Cava, A.W. Hewat, E.A. Hewat, B. Batlogg, M. Marezio, K.M. Rabe, J.J. Krajewski, W.F. Peck Jr and L.W. Rupp Jr: “Structural anomalies, oxygen ordering and superconductivity in oxygen defficient Ba2YCu3Ox”, Physica C, Vol. 165, (1990), pp. 419–433. http://dx.doi.org/10.1016/0921-4534(90)90376-P[Crossref]
  • [4] R.G. Buckley, J.L. Tallon, D.M. Pooke and M.R. Presland: “Calcium-substituted superconducting RBa2Cu4O8 with T∼90 K prepared at one atmosphere”, Physica C, Vol. 165, (1990), pp. 391–396. http://dx.doi.org/10.1016/0921-4534(90)90372-L[Crossref]
  • [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
  • [6] E.K. Nazarova, A.J. Zaleski, A.L. Zahariev, A.K. Stoyanova-Ivanova and K.N. Zalamova: “Effects of substituting calcium for yttrium on the superconducting properties of YBa2Cu3Oz bulk samples”, Physica C, Vol. 403, (2004), pp. 283–289. http://dx.doi.org/10.1016/j.physc.2004.01.002[Crossref]
  • [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]
  • [11] Yoshimi Kubo, Tsutomu Yoshitake, Junji Tabuchi, Yukinobu Nakabayashi, Atsushi Ochi, Kazuaki Utsumi, Hitoshi Igarashi and Masatomo Yonezawa: “Effect of Oxygen Deficiency on the Crystal Structure and Superconducting Properties of the Ba2YCu3Oy”, Japan. J. Appl. Phys., Vol. 26(5), (1987), pp. 768–770. http://dx.doi.org/10.1143/JJAP.26.L768[Crossref]
  • [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.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_1007_s11532-005-0013-x
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