Synthesis of a 90 K Y2Ba4Cu7O15-x superconductor under ambient pressure by triethylammoniumoxalate co-precipitation

Teng-Ming Chen*, J. S. Ho, R. S. Liu, H. S. Koo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


A 90 K superconducting Y2Ba4Cu7O15-x (247) powder with fine and homogeneous grain size was prepared by oxalate/triethylamine co-precipitation of a stoichiometric amount of mixed cations of yttrium, barium and copper from their aqueous solution of nitrate salts. Characterization results of the 247 superconductor by X-ray diffraction, electrical resistivity and magnetization measurements are reported. The intragrain critical current density (Jc) of the as-prepared 247 superconductor was derived from magnetic hysteresis to be 8.5 × 106 A/cm2 at 5 K and 1 T. This new route may have considerable potential in the large-scale preparation of Y2Ba4Cu7O15-x.

Original languageEnglish
Pages (from-to)435-438
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue number3-4
StatePublished - 1 Oct 1993

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