The Use of Oxygen Gradients as a Texturing Mechanism During Isothermal Melt Processing of Bi-2212 Superconductors

Conference · Wed Jan 01 00:00:00 EST 1997

OSTI ID:562553

Holesinger, T G; Hults, W L; Smith, J L ^[1]; Dai, Weiming; Marken, K R ^[2]

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1. Los Alamos National Lab., NM (United States)
2. Oxford Instruments Inc., Carteret, NJ (United States)

Isothermal melt processing has been used to produce high critical currents (I{sub c}`s) and current densities (J{sub c}`s) in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub y} round wires and flat tapes. I{sub c}`s and J{sub c}`s of 225 A and 80 kA/cm{sup 2} have been obtained in short length, monocore wires. However, voids and other macroscopic defects have limited performance over longer lengths. Isothermally melt processed tapes have yielded I{sub c} and J{sub c} values up to 341 A and 245 kA/cm{sup 2}, although performance over longer lengths is somewhat reduced. A test coil made from 0.5 m of tape yielded, I{sub c} and J{sub c} values of 208 A and 153 kA/cm{sup 2}, respectively.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 562553
• Report Number(s): LA-UR-97-2629; CONF-970568-; ON: DE98001452; TRN: 98:000409
• Resource Relation: Conference: 99. annual meeting of the American Ceramic Society, Cincinnati, OH (United States), 4-7 May 1997; Other Information: PBD: 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ISOTHERMAL PROCESSES
BISMUTH OXIDES
STRONTIUM OXIDES
CALCIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
SUPERCONDUCTING WIRES
CRITICAL CURRENT
HEAT TREATMENTS