A two-powder process for Bi-2223 precursors

Journal Article · Mon Jan 01 04:00:00 EST 1996 · Journal of Materials Research

DOI:https://doi.org/10.1557/JMR.1996.0005· OSTI ID:278469

Holesinger, T G; Salazar, K V; Phillips, D S; Sargent, B L; Bremser, J K; Bingert, J F; Willis, J O; Peterson, D E ^[1]

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1. Superconductivity Technology Center, MS K763, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

A two-powder process is described for the production of uniform, fine-grained Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub {ital y}} (Bi-2223) powders. One powder is the Bi{sub 2.1{minus}{ital x}}Pb{sub {ital x}}Sr{sub 1.9{minus}{ital y}}Ca{sub {ital y}}O{sub {ital z}} (2:2 Cu-free) phase. The other is a multi-phase powder of approximate overall composition SrCaCu{sub 3}O{sub {ital y}}. The 2:2 Cu-free is one of the first Bi-containing phases to form from a nominal Bi-2223 mixture of oxides and carbonates. This precursor route was chosen for investigation because (1) powders have very similar particle morphologies and (2) the mixing volumes are closely matched. Both of these characteristics facilitate the milling and blending process. This precursor mix was found to be stable in that explosive grain growth of dundesirable phases was not observed during sintering. Critical current densities up to 26,900 A/cm{sup 2} in self field at 75 K were obtained in tapes. {copyright} {ital 1996 Materials Research Society.}

• Sponsoring Organization: USDOE
• OSTI ID: 278469
• Journal Information: Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 1 Vol. 11; ISSN JMREEE; ISSN 0884-2914
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
FABRICATION
MORPHOLOGY
POWDERS
STRONTIUM OXIDES
TEMPERATURE RANGE 0065-0273 K