Vapor pressures of bismuth, lead, and copper components in Bi sub 2 Sr sub 1. 7 CaCu sub 2 O sub y and Bi sub 1. 7 Pb sub 0. 3 Sr sub 1. 7 Ca sub 2 Cu sub 3 O sub y superconductor ceramics

Journal Article · Wed Apr 01 00:00:00 EST 1992 · Journal of the American Ceramic Society; (United States)

OSTI ID:5069967

Stata, T; Sakai, K; Tashiro, S ^[1]

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1. Dept. of Industrial Chemistry, Kumamoto Inst. of Technology, Kumamoto 860 (JP)

The vapor pressures of the Bi system superconductor oxides Bi{sub 2}Sr{sub 1.7}CaCu{sub 2}O{sub y} (BSCCO) and Bi{sub 1.7}Pb{sub 0.3}Sr{sub 1.7}Ca{sub 2}Cu{sub 3}O{sub y} (BPSCCO) were determined by the transpiration method in atmospheres of O{sub 2}, air, and N{sub 2}, in the temperature range 730{degrees} to 820{degrees} C. The Bi/Cu atomic ratios of the vapor increased from 0.8 to 4.6 with increasing temperature for BSCCO, and the Bi/Cu/Pb ratio was 1.1/1/72 for BPSCCO at 800{degrees} C in O{sub 2}. Vapor pressures for the vapor species Cu, CuO, Bi{sub 4}O{sub 6}, PbO, and Pb{sub 2}O{sub 2} were calculated using the literature values. Vapor pressures for Cu were higher and those for both Bi and Pb lower than values estimated from the pure oxides. These values are discussed in the present paper in relation to crystal structure.

• OSTI ID: 5069967
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 75:4; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
BISMUTH
VAPOR PRESSURE
BISMUTH OXIDES
SUPERCONDUCTIVITY
COPPER
LEAD
SUPERCONDUCTORS
CRYSTAL STRUCTURE
CUPRATES
TEMPERATURE DEPENDENCE
BISMUTH COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
METALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
665412* - Superconducting Devices- (1992-)
665411 - Basic Superconductivity Studies- (1992-)
360207 - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies