Thermodynamic and nonstoichiometric behavior of the lead-doped and lead-free Bi-2212 systems

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EMF measurements of oxygen fugacities as a function of stoichiometry were made on pb-doped and Pb-free superconducting ceramics at 700-815 C using oxygen titration. Equations of oxygen partial pressure vs composition and temperature were derived from the EMF measurements. Thermodynamic assessments of the partial molar quantities {Delta}{bar H}(O{sub 2}) and {Delta}{bar S}(O{sub 2}) for Pb-doped Bi- 2212 and Pb-free Bi-2212 indicate that the solid-state decomposition of these Bi cuprates at low oxygen partial pressure can be represented by the diphasic CuO-Cu{sub 2}O system. Comparison of these results with Pb-doped Bi-2223 in powder and silver sheath form is presented.

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3 p.

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Tetenbaum, M.; Hash, M.; Tani, B.S.; Luo, J.S. & Maroni, V.A. February 1, 1997.

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EMF measurements of oxygen fugacities as a function of stoichiometry were made on pb-doped and Pb-free superconducting ceramics at 700-815 C using oxygen titration. Equations of oxygen partial pressure vs composition and temperature were derived from the EMF measurements. Thermodynamic assessments of the partial molar quantities {Delta}{bar H}(O{sub 2}) and {Delta}{bar S}(O{sub 2}) for Pb-doped Bi- 2212 and Pb-free Bi-2212 indicate that the solid-state decomposition of these Bi cuprates at low oxygen partial pressure can be represented by the diphasic CuO-Cu{sub 2}O system. Comparison of these results with Pb-doped Bi-2223 in powder and silver sheath form is presented.

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3 p.

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OSTI as DE97003220

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  • International conference on materials and mechanisms of superconductivity: high temperature superconductors, Beijing (China), 28 Feb - 4 Mar 1997

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  • Other: DE97003220
  • Report No.: ANL/CMT/CP--90988
  • Report No.: CONF-970235--1
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 437758
  • Archival Resource Key: ark:/67531/metadc689000

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  • February 1, 1997

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  • July 25, 2015, 2:20 a.m.

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  • Dec. 16, 2015, 5:22 p.m.

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Tetenbaum, M.; Hash, M.; Tani, B.S.; Luo, J.S. & Maroni, V.A. Thermodynamic and nonstoichiometric behavior of the lead-doped and lead-free Bi-2212 systems, article, February 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc689000/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.