Sintering of bulk high- Tc superconductors: Bi-Sr-Ca-Cu-O

Conference · Fri May 01 00:00:00 EDT 1992

OSTI ID:5132596

Goretta, K C; Lanagan, M T; Kaufman, D Y; Biondo, A C; Wu, C T; Loomans, M E; Cheesman, M R; Poeppel, R B ^[1]; Nash, A S ^[2]

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1. Argonne National Lab., IL (United States)
2. Marquette Univ., Milwaukee, WI (United States)

Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub x} (2212) and (Bi,Pb){sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub x} (2223) superconductors have orthorhombic crystal structures. They form platelike grains that at high temperatures grow primarily in the a-b planes and not in the c direction. The diffusional properties of Bi-Sr-Ca-Cu-O superconductors are so anisotropic that 2212 and 2223 cannot, in general, be densified by solid-state sintering. Improved densification can be achieved by application of pressure or by use of transient liquid phases. Most useful bulk Bi-Sr-Ca-Cu-O superconductors are composites that contain Ag. The Ag lowers the melting points of the superconductors, which has significant effects on microstructural development. The results of disparate sintering studies are presented and discussed.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5132596
• Report Number(s): ANL/CP-74239; CONF-9206195-2; ON: DE92016189
• Resource Relation: Conference: 1992 powder metallurgy world congress, San Francisco, CA (United States), 21-26 Jun 1992
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
SINTERING
CALCIUM OXIDES
COPPER OXIDES
STRONTIUM OXIDES
HIGH-TC SUPERCONDUCTORS
MICROSTRUCTURE
SCANNING ELECTRON MICROSCOPY
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
FABRICATION
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
STRONTIUM COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies