Effect of the variation-temperature-sintering on microstructure and superconducting properties of Bi-2223/Ag tapes in high magnetic fields

X. Y. Lu; Kazuo Watanabe; D. Yi; H. Chen; A. Nagata

doi:10.1016/j.physc.2011.05.131

Effect of the variation-temperature-sintering on microstructure and superconducting properties of Bi-2223/Ag tapes in high magnetic fields

X. Y. Lu, Kazuo Watanabe, D. Yi, H. Chen, A. Nagata

High Field Laboratory for Superconducting Materials

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

3 Citations (Scopus)

Abstract

The microstructure and superconducting properties of Bi-2223/Ag tapes fabricated in the variation-temperature-sintering process during high magnetic fields were investigated. The flat tapes 0.6 mm in thickness and 3 mm in width set on the an isolite holder were sintered in following conditions for 120 h in 10 T magnetic fields in air: (1) isothermal-temperature-sintering at 835 °C, (2) variation-temperature-sintering from 840 to 835 °C, (3) variation-temperature-sintering from 845 to 835 °C, (4) variation- temperature-sintering from 850 to 835 °C, (5) variation-temperature- sintering from 835 to 840 °C. The results show that the tapes variation-temperature-sintered from high temperature to low temperature show stronger c-axis alignment of the Bi-2223 phase and higher J_c value than that isothermal-temperature-sintered and variation-temperature-sintered from low temperature to high temperature. However, the starting temperature (above 850 °C) of the variation-temperature-sintering from high temperature to low temperature is too high, the proportion of Bi-2223 phase decreases largely. The tape variation-temperature-sintered from 845 to 835 °C in a 10 T magnetic fields shows a strong c-axis alignment of the Bi-2223 phase, a high proportion of Bi-2223 phase, and the highest J_c value.

Original language	English
Pages (from-to)	1090-1092
Number of pages	3
Journal	Physica C: Superconductivity and its applications
Volume	471
Issue number	21-22
DOIs	https://doi.org/10.1016/j.physc.2011.05.131
Publication status	Published - 2011 Nov 1

Keywords

Bi-2223
Critical current density
Magnetic field sintering
Superconductors
Texture

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "Effect of the variation-temperature-sintering on microstructure and superconducting properties of Bi-2223/Ag tapes in high magnetic fields",

abstract = "The microstructure and superconducting properties of Bi-2223/Ag tapes fabricated in the variation-temperature-sintering process during high magnetic fields were investigated. The flat tapes 0.6 mm in thickness and 3 mm in width set on the an isolite holder were sintered in following conditions for 120 h in 10 T magnetic fields in air: (1) isothermal-temperature-sintering at 835 °C, (2) variation-temperature-sintering from 840 to 835 °C, (3) variation-temperature-sintering from 845 to 835 °C, (4) variation- temperature-sintering from 850 to 835 °C, (5) variation-temperature- sintering from 835 to 840 °C. The results show that the tapes variation-temperature-sintered from high temperature to low temperature show stronger c-axis alignment of the Bi-2223 phase and higher Jc value than that isothermal-temperature-sintered and variation-temperature-sintered from low temperature to high temperature. However, the starting temperature (above 850 °C) of the variation-temperature-sintering from high temperature to low temperature is too high, the proportion of Bi-2223 phase decreases largely. The tape variation-temperature-sintered from 845 to 835 °C in a 10 T magnetic fields shows a strong c-axis alignment of the Bi-2223 phase, a high proportion of Bi-2223 phase, and the highest Jc value.",

keywords = "Bi-2223, Critical current density, Magnetic field sintering, Superconductors, Texture",

author = "Lu, {X. Y.} and Kazuo Watanabe and D. Yi and H. Chen and A. Nagata",

year = "2011",

month = nov,

day = "1",

doi = "10.1016/j.physc.2011.05.131",

language = "English",

volume = "471",

pages = "1090--1092",

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T1 - Effect of the variation-temperature-sintering on microstructure and superconducting properties of Bi-2223/Ag tapes in high magnetic fields

AU - Lu, X. Y.

AU - Watanabe, Kazuo

AU - Yi, D.

AU - Chen, H.

AU - Nagata, A.

PY - 2011/11/1

Y1 - 2011/11/1

N2 - The microstructure and superconducting properties of Bi-2223/Ag tapes fabricated in the variation-temperature-sintering process during high magnetic fields were investigated. The flat tapes 0.6 mm in thickness and 3 mm in width set on the an isolite holder were sintered in following conditions for 120 h in 10 T magnetic fields in air: (1) isothermal-temperature-sintering at 835 °C, (2) variation-temperature-sintering from 840 to 835 °C, (3) variation-temperature-sintering from 845 to 835 °C, (4) variation- temperature-sintering from 850 to 835 °C, (5) variation-temperature- sintering from 835 to 840 °C. The results show that the tapes variation-temperature-sintered from high temperature to low temperature show stronger c-axis alignment of the Bi-2223 phase and higher Jc value than that isothermal-temperature-sintered and variation-temperature-sintered from low temperature to high temperature. However, the starting temperature (above 850 °C) of the variation-temperature-sintering from high temperature to low temperature is too high, the proportion of Bi-2223 phase decreases largely. The tape variation-temperature-sintered from 845 to 835 °C in a 10 T magnetic fields shows a strong c-axis alignment of the Bi-2223 phase, a high proportion of Bi-2223 phase, and the highest Jc value.

AB - The microstructure and superconducting properties of Bi-2223/Ag tapes fabricated in the variation-temperature-sintering process during high magnetic fields were investigated. The flat tapes 0.6 mm in thickness and 3 mm in width set on the an isolite holder were sintered in following conditions for 120 h in 10 T magnetic fields in air: (1) isothermal-temperature-sintering at 835 °C, (2) variation-temperature-sintering from 840 to 835 °C, (3) variation-temperature-sintering from 845 to 835 °C, (4) variation- temperature-sintering from 850 to 835 °C, (5) variation-temperature- sintering from 835 to 840 °C. The results show that the tapes variation-temperature-sintered from high temperature to low temperature show stronger c-axis alignment of the Bi-2223 phase and higher Jc value than that isothermal-temperature-sintered and variation-temperature-sintered from low temperature to high temperature. However, the starting temperature (above 850 °C) of the variation-temperature-sintering from high temperature to low temperature is too high, the proportion of Bi-2223 phase decreases largely. The tape variation-temperature-sintered from 845 to 835 °C in a 10 T magnetic fields shows a strong c-axis alignment of the Bi-2223 phase, a high proportion of Bi-2223 phase, and the highest Jc value.

KW - Bi-2223

KW - Critical current density

KW - Magnetic field sintering

KW - Superconductors

KW - Texture

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