Pure and lithium-doped Bi2Sr2CaCu2Ox silver-clad tapes

K. C. Goretta; C. T. Wu; M. T. Lanagan; R. B. Poeppel; J. Schwartz; S. Wu

doi:10.1007/BF02818075

Pure and lithium-doped Bi₂Sr₂CaCu₂O_x silver-clad tapes

K. C. Goretta, C. T. Wu, M. T. Lanagan, R. B. Poeppel, J. Schwartz, S. Wu

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Silver-clad tapes with transport J_c values to 10⁵ A/cm² at T-4.2K were produced by a powder-in-tube process. Moderate reductions per pass and proper tape thicknesses were essential for producing good conductors. Partial-melt sintering, followed by a solid-state heat treatment, produced microstructures consisting of large, well-aligned 2212 grains and alkaline-earth cuprate phases. The deleterious effects of these second phases were minimized by proper heat treatments, but further reductions in the sizes and concentrations of these phases are needed to improve J_c values substantially. Lithium additions raised T_c, improved flux pinning, and lowered melting points. They offer hope that the presence of alkaline-earth cuprates can be limited through use of low-temperature heat treatments.

Original language	English (US)
Pages (from-to)	1289-1294
Number of pages	6
Journal	Journal of Electronic Materials
Volume	22
Issue number	10
DOIs	https://doi.org/10.1007/BF02818075
State	Published - Oct 1993

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

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10.1007/BF02818075

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title = "Pure and lithium-doped Bi2Sr2CaCu2Ox silver-clad tapes",

abstract = "Silver-clad tapes with transport Jc values to 105 A/cm2 at T-4.2K were produced by a powder-in-tube process. Moderate reductions per pass and proper tape thicknesses were essential for producing good conductors. Partial-melt sintering, followed by a solid-state heat treatment, produced microstructures consisting of large, well-aligned 2212 grains and alkaline-earth cuprate phases. The deleterious effects of these second phases were minimized by proper heat treatments, but further reductions in the sizes and concentrations of these phases are needed to improve Jc values substantially. Lithium additions raised Tc, improved flux pinning, and lowered melting points. They offer hope that the presence of alkaline-earth cuprates can be limited through use of low-temperature heat treatments.",

author = "Goretta, {K. C.} and Wu, {C. T.} and Lanagan, {M. T.} and Poeppel, {R. B.} and J. Schwartz and S. Wu",

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T1 - Pure and lithium-doped Bi2Sr2CaCu2Ox silver-clad tapes

AU - Goretta, K. C.

AU - Wu, C. T.

AU - Lanagan, M. T.

AU - Poeppel, R. B.

AU - Schwartz, J.

AU - Wu, S.

PY - 1993/10

Y1 - 1993/10

N2 - Silver-clad tapes with transport Jc values to 105 A/cm2 at T-4.2K were produced by a powder-in-tube process. Moderate reductions per pass and proper tape thicknesses were essential for producing good conductors. Partial-melt sintering, followed by a solid-state heat treatment, produced microstructures consisting of large, well-aligned 2212 grains and alkaline-earth cuprate phases. The deleterious effects of these second phases were minimized by proper heat treatments, but further reductions in the sizes and concentrations of these phases are needed to improve Jc values substantially. Lithium additions raised Tc, improved flux pinning, and lowered melting points. They offer hope that the presence of alkaline-earth cuprates can be limited through use of low-temperature heat treatments.

AB - Silver-clad tapes with transport Jc values to 105 A/cm2 at T-4.2K were produced by a powder-in-tube process. Moderate reductions per pass and proper tape thicknesses were essential for producing good conductors. Partial-melt sintering, followed by a solid-state heat treatment, produced microstructures consisting of large, well-aligned 2212 grains and alkaline-earth cuprate phases. The deleterious effects of these second phases were minimized by proper heat treatments, but further reductions in the sizes and concentrations of these phases are needed to improve Jc values substantially. Lithium additions raised Tc, improved flux pinning, and lowered melting points. They offer hope that the presence of alkaline-earth cuprates can be limited through use of low-temperature heat treatments.

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Pure and lithium-doped Bi₂Sr₂CaCu₂O_x silver-clad tapes

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