Preparation of YBa2Cu3O7-δ powders by the thermal decomposition of a heteronuclear complex, CuY1/3Ba2/3(dhbaen)(NO3)1/3(H2O)3

Etsuko Hasegawa, Hiromichi Aono, Tetsuya Igoshi, Masatomi Sakamoto, Enrico Traversa, Yoshihiko Sadaoka

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16 Scopus citations

Abstract

YBa2Cu3O7-δ powders were prepared by the thermal decomposition of a heteronuclear complex, CuY1/3Ba2/3(dhbaen)(NO3)1/3(H2O)3. The products of the complex thermal decomposition were analyzed by TG-DTA, XRD, SEM-Auger and XPS. The decomposition of the CuY1/3Ba2/3-complex was obtained at about 500°C and the product was a mixture of oxides and carbonates. The formation of YBa2Cu3O7-δ proceeded at 800°C, with a gradual decomposition of the carbonates. A homogeneous distribution of each element, Y, Ba, and Cu, was observed for the decomposed CuY1/3Ba2/3-complex by SEM-Auger analysis. The binding energy values of Ba3d5/2 and O1s photolines from Ba and O in the superconductive lattice did not shift during the sputtering period. Furthermore, the formation of Ba rich regions on the surface was depressed by using the complex as a starting material for homogeneous 123-oxide, YBa2Cu3O7-δ.

Original languageEnglish (US)
Pages (from-to)150-158
Number of pages9
JournalJournal of Alloys and Compounds
Volume287
Issue number1-2
DOIs
StatePublished - Jun 1 1999

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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