Characterization of YBa2Cu4O8 high temperature electrical properties and thermodynamic stability

B. S. Hong, Thomas O Mason

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Abstract

Via in situ electrical property measurements (conductivity, Seebeck coefficient) over the temperature range 500-800°C and oxygen partial pressure range 10-4-1 atm, the equilibrium transport properties and stability range of YBa2Cu4O8 were determined. YBa2Cu4O8 behaves like the intrinsically mixed-valent compound, magnetite (Fe3O4), with small variations in electrical properties with changes in oxygen partial pressure. The decomposition boundary to YBa2Cu3O6+y (or YBa2Cu3.5O7.5±z) and CuO occurs at log(pO(2), atm) = -1.24 × 104/T(K) + 11.01 (773 ≤ T(K) ≤ 1073).

Original languageEnglish
Pages (from-to)2054-2058
Number of pages5
JournalJournal of Materials Research
Volume6
Issue number10
Publication statusPublished - Oct 1991

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ASJC Scopus subject areas

  • Materials Science(all)

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