Effect of temperature and atmosphere on stability of high- T sub c phases in Bi--Pb--Sr--Ca--Cu--O superconductors

Journal Article · Sun Sep 01 00:00:00 EDT 1991 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.349361· OSTI ID:5338206

Lee, H K; Park, K; Ha, D H ^[1]

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1. Korea Standards Research Institute, P. O. Box 3, Taedok Science Town, Taejon 305-606 (Korea)

The effect of temperature and atmosphere on stability of the high-{ital T}{sub {ital c}} phase in Bi{sub 1.8}Pb{sub 0.4}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub {ital x}} superconductors has been investigated using ac susceptibility, x-ray diffraction, and Raman measurements. It is found that the high-{ital T}{sub {ital c}} phase becomes unstable due to the structural phase transformation at temperature above 650 {degree}C in O{sub 2} of 1 atm. The formation and the decomposition of the high-{ital T}{sub {ital c}} phase is found to occur through the medium of the Ca{sub 2}PbO{sub {ital x}} phase and depends on oxygen partial pressure at temperature above 650 {degree}C.

• OSTI ID: 5338206
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 70:5; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
HIGH TEMPERATURE
HIGH-TC SUPERCONDUCTORS
LEAD COMPOUNDS
LEAD OXIDES
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
STABILITY
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
TEMPERATURE EFFECTS
TRANSITION ELEMENT COMPOUNDS