Formation of (Ca sub 1 minus x Sr sub x ) sub 2 PbO sub 4 in Bi(Pb)-Sr-Ca-Cu-O system: Correlation with the formation of the 2223 high- Tc phase

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.346535· OSTI ID:6430196

Shiloh, M; Wood, I; Brown, M; Beech, F; Boyd, I W ^[1]

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1. Department of Electronic and Electrical Engineering, University College London, Torrington Place, London WC1E 7JE (United Kingdom)

X-ray diffraction data of Bi{sub 1.4}Pb{sub 0.6}Sr{sub 2}Ca{sub 2}Cu{sub 3.6}O{sub 10+{ital x}} samples show a sharp change near the annealing temperature of 845 {degree}C. Below this temperature a solid solution of (Ca{sub 0.867}Sr{sub 0.133}){sub 2}PbO{sub 4} is formed and prolonged annealing leads to transformation of the 2212 phase to the 2223 phase. Above this temperature, Ca{sub 2}PbO{sub 4} is formed, and prolonged annealing leads to an irreversible transformation of both the 2212 phase and the 2223 phase to the 2201 phase.

• OSTI ID: 6430196
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 68:5; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
ANNEALING
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
DIFFRACTION
DISPERSIONS
HEAT TREATMENTS
HIGH-TC SUPERCONDUCTORS
IRREVERSIBLE PROCESSES
LEAD COMPOUNDS
LEAD OXIDES
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
PHASE TRANSFORMATIONS
SCATTERING
SOLID SOLUTIONS
SOLUTIONS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION