Effect of lead content on Bi-2223 Formation by a two-powder process

Conference · Wed Feb 01 00:00:00 EST 1995

OSTI ID:67766

Dorris, S E; Pitz, M A; Dawley, J T; Trapp, D J

Decreasing the total lead content from Pb{sub 0.4} to Pb{sub 0.3} significantly stunts Bi-2223 phase development and greatly reduces the critical current density (J{sub c}) of powder-in-tube tapes made by a two-powder process. This effect can be explained on the basis of the solubility limit for lead in 2212. Pb{sub 0.4} samples exceed the solubility limit for lead in 2212, so lead is rejected to create a lead-rich liquid that enhances the kinetics of 2223 formation during heat treatment. By contrast, a liquid does not form in the Pb{sub 0.3} sample because its lead content is below the solubility limit. As a result, 2223 formation is much slower and J{sub c} is much lower in the Pb{sub 0.3} sample.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 67766
• Report Number(s): ANL/ET/CP-83802; CONF-950201-14; ON: DE95009889; TRN: 95:004544
• Resource Relation: Conference: Annual meeting and exhibition of the Minerals, Metals and Materials Society (TMS), Las Vegas, NV (United States), 12-16 Feb 1995; Other Information: PBD: Feb 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
SUPERCONDUCTIVITY
LEAD OXIDES
CALCIUM OXIDES
COPPER OXIDES
STRONTIUM OXIDES
POWDERS
MICROSTRUCTURE
CRITICAL CURRENT
CURRENT DENSITY
PHASE TRANSFORMATIONS
CHEMICAL COMPOSITION