Crystallization features of YBa 2 Cu 3 O 7‐δ  in the Y 2 BaCuO 5 ‐BaCuO 2 ‐CuO and Y 2 Cu 2 O 5 ‐BaCuO 2  systems | Zendy

Kalanda N. A. | Zendy; Gurskii L. I. | Zendy; Saad A. M. | Zendy; Truhan V. M. | Zendy; Haliakevich T. V. | Zendy

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Crystallization features of YBa 2 Cu 3 O 7‐δ in the Y 2 BaCuO 5 ‐BaCuO 2 ‐CuO and Y 2 Cu 2 O 5 ‐BaCuO 2 systems

Author(s) -

Kalanda N. A.,

Gurskii L. I.,

Saad A. M.,

Truhan V. M.,

Haliakevich T. V.

Publication year - 2008

Publication title -

crystal research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.377

H-Index - 64

eISSN - 1521-4079

pISSN - 0232-1300

DOI - 10.1002/crat.200711127

Subject(s) - crystallite , crystallization , microstructure , materials science , crystallography , grain size , mineralogy , analytical chemistry (journal) , chemistry , metallurgy , chromatography , organic chemistry

Based on the data of X‐ray phase and microstructure analysis, the sample composition was optimized in order to provide maximum size of the textured macrograins of YBa 2 Cu 3 O 7‐δ and of the crystallites in the Y 2 BaCuO 5 ‐BaCuO 2 ‐CuO, Y 2 Cu 2 O 5 ‐BaCuO 2 systems. The growth rate has been studied and the YBa 2 Cu 3 O 7‐δ growth activation energy has been calculated for the samples of Y 2 BaCuO 5 +3BaCuO 2 +2.3CuO, Y 2 BaCuO 5 +3BaCuO 2 +0.6CuO, and Y 2 Cu 2 O 5 +3.5BaCuO 2 compounds in the temperature range of 1240‐1270K for the case of use of the Y 2 Cu 2 O 5 and Y 2 BaCuO 5 precursors with an average grain diameter of 10 μm and 1mm. A crystallization mechanism of YBa 2 Cu 3 O 7‐δ in the Y 2 BaCuO 5 ‐BaCuO 2 ‐CuO and Y 2 Cu 2 O 5 ‐BaCuO 2 systems in the case of different sizes of Y 2 BaCuO 5 and Y 2 Cu 2 O 5 precursor grains was proposed and validated. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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