Effect of partial substitution of calcium for yttrium on the structure and properties of the Y0.9Ca0.1Ba2Cu3O6.8 superconductor
- 47 Downloads
The crystal structure of the high-temperature Y1–x Ca x Ba2Cu3O6.8 superconductor has been studied in a temperature range of 80–300 K using low-temperature X-ray diffraction analysis; its microstructure has been studied by scanning and transmission electron microscopy. Changes of the bond length in the structure of principal phase and precipitation topology of impurity phases and their compositions have been analyzed. An addition of calcium was shown to increase the environmental tolerance of the principal Y123 phase and its microhardness and ensures the low unchanged coefficient of thermal expansion. All of the facts indicate that the material can be used to manufacture composite superconducting articles.
Keywordshigh-temperature superconductor coefficient of thermal expansion structure
Unable to display preview. Download preview PDF.
- 1.S. G. Titova and J. T. S. Irvine, “Perspectives of superconducting temperature increase in HTSC copper oxides,” in Superconductivity Research Developments, Ed. by J. R. Tobin (Nova Sci., New York, 2008), pp. 93–123.Google Scholar
- 11.A. C. Larson and R. B. von Dreele, General Structure Analysis System (GSAS), Los Alamos National Laboratory Report LAUR, 2000. P. 86–748.Google Scholar
- 14.S. Sh. Shil’shtein, A. S. Ivanov, and V. A. Somenkov, Coulomb Splitting of Atomic Layers in Layered Cuprate and Nickelate Lattices (RNTs Kurchatovskii Institut, Moscow, 1994) [in Russian].Google Scholar
- 15.E. P. Romanov, S. V. Sudareva, E. N. Popova, and T. P. Krinitsina, Lowand High-Temperature Superconductors and Composites on Their Basis (Ural. Otd. Ross. Akad. Nauk, Ekaterinburg, 2009) [in Russian].Google Scholar
- 17.E. I. Kuznetsova, M. V. Kuznetsov, Yu. V. Blinova, T. P. Krinitsina, S. V. Sudareva, E. P. Romanov, D. N. Rakov, and Yu. N. Belotelova, “X-ray photoelectron spectroscopy of ceramic composites Bi,Pb2223/Ag annealed in an atmosphere with a reduced content of oxygen (7.5% O2 + 92.5% N2),” Phys. Met. Metallogr. 113, 365–371 (2012).CrossRefGoogle Scholar
- 22.B. V. Crist, Handbook of Monochromatic XPS Spectra— Commercially Pure Binary Oxides (XPS Int., 2005), vol. 2.Google Scholar
- 24.V. B. Vykhodets, A. E. Davletshin, A. G. Kesarev, Yu. Kester, V. V. Kondrat’ev, M. V. Kuznetsov, T. E. Kurennykh, and K. Khulsen, “Kinetics of diffusion processes for marked atoms of carbon and oxygen in the Zr–O–C system,” in Physico-Chemical Kinetics in Gas Dynamics. wwwchemphyseduru/pdf/2009-1112-001pdfGoogle Scholar
- 27.X. D. Wu, A. Inam, M. S. Hegde, T. Venkatesan, C. C. Chang, E. W. Chase, B. Wilkens, and J. M. Tarascon, “Crystalline perfection of as-deposited high-Tc superconducting thin-film surfaces: Ion channeling and X-ray photoelectron spectroscopy study,” Phys. Rev. B: Condens. Matter 38, 9307–9310 (1988).CrossRefGoogle Scholar