Decomposition products of superconducting (Bi,Pb)[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub 10+[delta]]

Journal Article · Fri Jul 15 04:00:00 EDT 1994 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.357831· OSTI ID:7198277

Xu, M; Finnemore, D K ^[1]

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1. Ames Laboratory, USDOE and Department of Physics, Iowa State University, Ames, Iowa 50011 (United States)

High-temperature [ital in] [ital situ] x-ray studies of Pb-doped Bi[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub 10+[delta]] have been carried out in a variety of different environments in order to determine the range of stability and the decomposition products that appear as this material transforms into other phases. In air at 840 [degree]C, a combination of Bi[sub 2]Sr[sub 2]Ca[sub 0]Cu[sub 1]O[sub 6+[delta]], Ca[sub 2]PbO[sub 4], (Sr,Ca)[sub 2]Cu[sub 1]O[sub 3], and some liquid phase coexists with Bi[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub 10+[delta]] as it gradually decomposes. When the Bi[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub 10+[delta]] is completely gone, the Bi[sub 2]Sr[sub 2]Ca[sub 0]Cu[sub 1]O[sub 6+[delta]], Ca[sub 2]PbO[sub 4], and (Sr,Ca)[sub 2]Cu[sub 1]O[sub 3] transform to a liquid with CaO and other phases floating on the liquid. If Ag is micromilled with the Bi[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub 10+[delta]], the decomposition process is similar, but all of the temperatures are lowered substantially. If the partial pressure of O[sub 2] is reduced to 10 kPa over the Bi[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub 10+[delta]]/Ag sample, the decomposition temperatures and products are similar to the 20 kPa case.

• OSTI ID: 7198277
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 76:2; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
DECOMPOSITION
DIFFRACTION
DOPED MATERIALS
HIGH-TC SUPERCONDUCTORS
LEAD ADDITIONS
LEAD ALLOYS
MATERIALS
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
SCATTERING
SILVER ADDITIONS
SILVER ALLOYS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION