Effects of Bi and Bi2O3 Additions on the Microstructure and Superconducting Properties of Powder-in-tube BSCCO (2212) Tapes

J. Guo; K. C. Goretta; J. A. Lewis

doi:10.1109/77.402944

Effects of Bi and Bi2O3 Additions on the Microstructure and Superconducting Properties of Powder-in-tube BSCCO (2212) Tapes

J. Guo, K. C. Goretta, J. A. Lewis

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

Abstract

The microstructural development and superconducting properties of Bi₂Sr₂CaCu₂O_x (Bi-2212) Ag-clad powder-in-tube tapes with 2 vol% bismuth (Bi) added from either Bi(s) or Bi₂O₃ powders were investigated. Such additives reduce the peritectic decomposition temperature of pure Bi-2212 by approximately 15-20°C. Scanning electron microscopy (SEM) and optical microscopy on polished top and cross-sections revealed that the volume fraction of Bi-free phases was lower in the Bi-added specimens relative to those based on pure Bi-2212. In addition, it appeared that the Bi-added samples had improved grain alignment, which was confirmed by x-ray diffraction analysis. Magnetic hysteresis (at 5 K between ± 5.5 T) and transport measurements (at 4.2 K) were performed on each specimen. These results showed that Bi-additions yielded superior magnetization critical currents, which is attributed to improved grain alignment and reduced secondary phases.

Original language	English (US)
Pages (from-to)	1860-1863
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	5
Issue number	2
DOIs	https://doi.org/10.1109/77.402944
State	Published - Jun 1995
Externally published	Yes

ASJC Scopus subject areas

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

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10.1109/77.402944

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title = "Effects of Bi and Bi2O3 Additions on the Microstructure and Superconducting Properties of Powder-in-tube BSCCO (2212) Tapes",

abstract = "The microstructural development and superconducting properties of Bi2Sr2CaCu2Ox (Bi-2212) Ag-clad powder-in-tube tapes with 2 vol% bismuth (Bi) added from either Bi(s) or Bi2O3 powders were investigated. Such additives reduce the peritectic decomposition temperature of pure Bi-2212 by approximately 15-20°C. Scanning electron microscopy (SEM) and optical microscopy on polished top and cross-sections revealed that the volume fraction of Bi-free phases was lower in the Bi-added specimens relative to those based on pure Bi-2212. In addition, it appeared that the Bi-added samples had improved grain alignment, which was confirmed by x-ray diffraction analysis. Magnetic hysteresis (at 5 K between ± 5.5 T) and transport measurements (at 4.2 K) were performed on each specimen. These results showed that Bi-additions yielded superior magnetization critical currents, which is attributed to improved grain alignment and reduced secondary phases.",

author = "J. Guo and Goretta, {K. C.} and Lewis, {J. A.}",

note = "Funding Information: This work was supported by the U.S. Department of Energy (DOE). Energy Efficiency and Renewable Energy, as part of a DOE program to develop electric power technology, and Basic Energy Sciences-Materials, under Contract W-3 1 - 109-Eng-38.",

year = "1995",

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doi = "10.1109/77.402944",

language = "English (US)",

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pages = "1860--1863",

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AU - Guo, J.

AU - Goretta, K. C.

AU - Lewis, J. A.

N1 - Funding Information: This work was supported by the U.S. Department of Energy (DOE). Energy Efficiency and Renewable Energy, as part of a DOE program to develop electric power technology, and Basic Energy Sciences-Materials, under Contract W-3 1 - 109-Eng-38.

PY - 1995/6

Y1 - 1995/6

N2 - The microstructural development and superconducting properties of Bi2Sr2CaCu2Ox (Bi-2212) Ag-clad powder-in-tube tapes with 2 vol% bismuth (Bi) added from either Bi(s) or Bi2O3 powders were investigated. Such additives reduce the peritectic decomposition temperature of pure Bi-2212 by approximately 15-20°C. Scanning electron microscopy (SEM) and optical microscopy on polished top and cross-sections revealed that the volume fraction of Bi-free phases was lower in the Bi-added specimens relative to those based on pure Bi-2212. In addition, it appeared that the Bi-added samples had improved grain alignment, which was confirmed by x-ray diffraction analysis. Magnetic hysteresis (at 5 K between ± 5.5 T) and transport measurements (at 4.2 K) were performed on each specimen. These results showed that Bi-additions yielded superior magnetization critical currents, which is attributed to improved grain alignment and reduced secondary phases.

AB - The microstructural development and superconducting properties of Bi2Sr2CaCu2Ox (Bi-2212) Ag-clad powder-in-tube tapes with 2 vol% bismuth (Bi) added from either Bi(s) or Bi2O3 powders were investigated. Such additives reduce the peritectic decomposition temperature of pure Bi-2212 by approximately 15-20°C. Scanning electron microscopy (SEM) and optical microscopy on polished top and cross-sections revealed that the volume fraction of Bi-free phases was lower in the Bi-added specimens relative to those based on pure Bi-2212. In addition, it appeared that the Bi-added samples had improved grain alignment, which was confirmed by x-ray diffraction analysis. Magnetic hysteresis (at 5 K between ± 5.5 T) and transport measurements (at 4.2 K) were performed on each specimen. These results showed that Bi-additions yielded superior magnetization critical currents, which is attributed to improved grain alignment and reduced secondary phases.

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Effects of Bi and Bi2O3 Additions on the Microstructure and Superconducting Properties of Powder-in-tube BSCCO (2212) Tapes

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