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

Conference · Fri May 01 04:00:00 EDT 1992

OSTI ID:10160167

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, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10160167
• Report Number(s): ANL/CP--74239; CONF-9206195--2; ON: DE92016189
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201
360202
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
MICROSTRUCTURE
PREPARATION AND FABRICATION
SCANNING ELECTRON MICROSCOPY
SINTERING
STRONTIUM OXIDES
STRUCTURE AND PHASE STUDIES