Fabrication and characterization of (Bi,Pb)-Sr-Ca-Cu-O (2223) bars

M. P. Chudzik; B. J. Polzin; R. Thayer; J. J. Picciolo; B. L. Fisher; M. T. Lanagan

doi:10.1109/77.621006

Fabrication and characterization of (Bi,Pb)-Sr-Ca-Cu-O (2223) bars

M. P. Chudzik, B. J. Polzin, R. Thayer, J. J. Picciolo, B. L. Fisher, M. T. Lanagan

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

2 Scopus citations

Abstract

Bulk bars for current lead applications were fabricated from (Bi,Pb)-Sr-Ca-Cu-O (Bi-2223) for low thermal conductivity and high critical current. Bars measuring 17. 8 cm in length were made by uniaxially pressing Bi-2223 powder of controlled (1. 7/0. 34)223 and (1. 8/0. 4)223 phase composition. The bulk bars were densified by subjecting them to a schedule of alternate liquid-phase sintering and cold isostatic pressing. Liquid-phase sintering temperatures were optimized from differential thermal analysis and microstructure morphology. Phase purity and microstructure were evaluated by X-ray diffraction and scanning electron microscopy. Low-resistance silver contacts were applied to the bars by hot-pressing at 820°C and 3 MPa. Critical current densities ≈ 1000 A/cm² (critical currents of 750 A at 77 K in self-field conditions) were achieved.

Original language	English (US)
Pages (from-to)	2102-2105
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	7
Issue number	2 PART 2
DOIs	https://doi.org/10.1109/77.621006
State	Published - 1997

All Science Journal Classification (ASJC) codes

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

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10.1109/77.621006

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title = "Fabrication and characterization of (Bi,Pb)-Sr-Ca-Cu-O (2223) bars",

abstract = "Bulk bars for current lead applications were fabricated from (Bi,Pb)-Sr-Ca-Cu-O (Bi-2223) for low thermal conductivity and high critical current. Bars measuring 17. 8 cm in length were made by uniaxially pressing Bi-2223 powder of controlled (1. 7/0. 34)223 and (1. 8/0. 4)223 phase composition. The bulk bars were densified by subjecting them to a schedule of alternate liquid-phase sintering and cold isostatic pressing. Liquid-phase sintering temperatures were optimized from differential thermal analysis and microstructure morphology. Phase purity and microstructure were evaluated by X-ray diffraction and scanning electron microscopy. Low-resistance silver contacts were applied to the bars by hot-pressing at 820°C and 3 MPa. Critical current densities ≈ 1000 A/cm2 (critical currents of 750 A at 77 K in self-field conditions) were achieved.",

author = "Chudzik, {M. P.} and Polzin, {B. J.} and R. Thayer and Picciolo, {J. J.} and Fisher, {B. L.} and Lanagan, {M. T.}",

year = "1997",

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T1 - Fabrication and characterization of (Bi,Pb)-Sr-Ca-Cu-O (2223) bars

AU - Chudzik, M. P.

AU - Polzin, B. J.

AU - Thayer, R.

AU - Picciolo, J. J.

AU - Fisher, B. L.

AU - Lanagan, M. T.

PY - 1997

Y1 - 1997

N2 - Bulk bars for current lead applications were fabricated from (Bi,Pb)-Sr-Ca-Cu-O (Bi-2223) for low thermal conductivity and high critical current. Bars measuring 17. 8 cm in length were made by uniaxially pressing Bi-2223 powder of controlled (1. 7/0. 34)223 and (1. 8/0. 4)223 phase composition. The bulk bars were densified by subjecting them to a schedule of alternate liquid-phase sintering and cold isostatic pressing. Liquid-phase sintering temperatures were optimized from differential thermal analysis and microstructure morphology. Phase purity and microstructure were evaluated by X-ray diffraction and scanning electron microscopy. Low-resistance silver contacts were applied to the bars by hot-pressing at 820°C and 3 MPa. Critical current densities ≈ 1000 A/cm2 (critical currents of 750 A at 77 K in self-field conditions) were achieved.

AB - Bulk bars for current lead applications were fabricated from (Bi,Pb)-Sr-Ca-Cu-O (Bi-2223) for low thermal conductivity and high critical current. Bars measuring 17. 8 cm in length were made by uniaxially pressing Bi-2223 powder of controlled (1. 7/0. 34)223 and (1. 8/0. 4)223 phase composition. The bulk bars were densified by subjecting them to a schedule of alternate liquid-phase sintering and cold isostatic pressing. Liquid-phase sintering temperatures were optimized from differential thermal analysis and microstructure morphology. Phase purity and microstructure were evaluated by X-ray diffraction and scanning electron microscopy. Low-resistance silver contacts were applied to the bars by hot-pressing at 820°C and 3 MPa. Critical current densities ≈ 1000 A/cm2 (critical currents of 750 A at 77 K in self-field conditions) were achieved.

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JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 2 PART 2

ER -

Fabrication and characterization of (Bi,Pb)-Sr-Ca-Cu-O (2223) bars

Abstract

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