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), Vol. 70:5; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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