Stability of Pb doped Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8+{delta}} and the growth of Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{delta}}

Journal Article · Mon Jun 12 04:00:00 EDT 1995 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.113757· OSTI ID:64851

Xu, M; Finnemore, D K ^[1]; Balachandran, U ^[2]; Haldar, P ^[3]

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1. Ames Laboratory, USDOE and Department of Physics, Iowa State University, Ames, Iowa 50011 (United States)
2. Energy Technology Division, Argonne National Laboratory, Argonne Illinois 60439 (United States)
3. Intermagnetics General Corporation, Latham, New York 12110 (United States)

{ital In} {ital situ} high-temperature x-ray measurements have been used to follow the crystallographic changes that occur as Pb-doped Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8+{delta}} plus other phases transform to Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{delta}} in a powder-in-tube process for forming tape conductors. On the initial ramp to the reaction temperature, the Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8+{delta}} x-ray lines first diminish in amplitude, by about a factor of 2 or more, and then begin to grow again above 700 {degree}C. In the 790--795 {degree}C range, a transient new phase is seen. Finally, at temperatures as low as 790 {degree}C, the Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{delta}} phase begins to grow as the Pb-doped Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8+{delta}} disappears. Separate studies of a Pb-doped Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub 8+{delta}} pellet without the Ca{sub 2}Cu{sub 1}O{sub 3} and CuO present show essentially the same peak intensity changes during the temperature ramp to 700 {degree}C. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

• Research Organization: Ames National Laboratory
• DOE Contract Number: W-7405-ENG-82; W-31109-ENG-38
• OSTI ID: 64851
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 24 Vol. 66; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRYSTAL DOPING
HIGH-TC SUPERCONDUCTORS
LEAD ADDITIONS
PHASE TRANSFORMATIONS
POWDERS
SINTERING
STRONTIUM OXIDES
SUPERCONDUCTING CABLES
SYNTHESIS
X-RAY DIFFRACTION