The formation process of Li-added Bi-2212 phase

Masashi Fujiwara; Takeyuki Kikuchi; Masahiro Nagae; Hideki Nakajima; Jun Takada

doi:10.2497/jjspm.43.178

The formation process of Li-added Bi-2212 phase

Masashi Fujiwara, Takeyuki Kikuchi, Masahiro Nagae, Hideki Nakajima, Jun Takada

Faculty of Engineering

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

Abstract

Effects of the Li-addition to the Bi-2212 phase on the formation process and the superconductive properties were studied for the samples with the nominal compositions of Bi : Sr : Ca : Cu : Li = 2 : 1.5 : 1.5 : 2 : x(x=0 to 0.6). The samples were heated at 560-860°C for 1 to 48h in air. Monophasic Bi-2212 samples was obtained for x=0.2 to 0.6 by heating above 730°C, which was approximately 100°C lower than that of the sample with x=0. A new compound containing Li element was formed in the temperature range between 700 and 720°C, which remarkably promoted the formation of the Bi-2212 phase. The lattice parameter c of the Bi-2212 phase increase with increasing Li content. The temperature dependence of magnetic susceptibility showed that Tc rose up to 90K for the sample with x=0.4 heated at 750°C for 12h.

Original language	English
Pages (from-to)	178-182
Number of pages	5
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	43
Issue number	2
DOIs	https://doi.org/10.2497/jjspm.43.178
Publication status	Published - Feb 1996

Keywords

2212 phase
Formation process
Lattice parameter
Li-addittion
Oxygen content
Tc

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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10.2497/jjspm.43.178

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title = "The formation process of Li-added Bi-2212 phase",

abstract = "Effects of the Li-addition to the Bi-2212 phase on the formation process and the superconductive properties were studied for the samples with the nominal compositions of Bi : Sr : Ca : Cu : Li = 2 : 1.5 : 1.5 : 2 : x(x=0 to 0.6). The samples were heated at 560-860°C for 1 to 48h in air. Monophasic Bi-2212 samples was obtained for x=0.2 to 0.6 by heating above 730°C, which was approximately 100°C lower than that of the sample with x=0. A new compound containing Li element was formed in the temperature range between 700 and 720°C, which remarkably promoted the formation of the Bi-2212 phase. The lattice parameter c of the Bi-2212 phase increase with increasing Li content. The temperature dependence of magnetic susceptibility showed that Tc rose up to 90K for the sample with x=0.4 heated at 750°C for 12h.",

keywords = "2212 phase, Formation process, Lattice parameter, Li-addittion, Oxygen content, Tc",

author = "Masashi Fujiwara and Takeyuki Kikuchi and Masahiro Nagae and Hideki Nakajima and Jun Takada",

year = "1996",

month = feb,

doi = "10.2497/jjspm.43.178",

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AU - Fujiwara, Masashi

AU - Kikuchi, Takeyuki

AU - Nagae, Masahiro

AU - Nakajima, Hideki

AU - Takada, Jun

PY - 1996/2

Y1 - 1996/2

N2 - Effects of the Li-addition to the Bi-2212 phase on the formation process and the superconductive properties were studied for the samples with the nominal compositions of Bi : Sr : Ca : Cu : Li = 2 : 1.5 : 1.5 : 2 : x(x=0 to 0.6). The samples were heated at 560-860°C for 1 to 48h in air. Monophasic Bi-2212 samples was obtained for x=0.2 to 0.6 by heating above 730°C, which was approximately 100°C lower than that of the sample with x=0. A new compound containing Li element was formed in the temperature range between 700 and 720°C, which remarkably promoted the formation of the Bi-2212 phase. The lattice parameter c of the Bi-2212 phase increase with increasing Li content. The temperature dependence of magnetic susceptibility showed that Tc rose up to 90K for the sample with x=0.4 heated at 750°C for 12h.

AB - Effects of the Li-addition to the Bi-2212 phase on the formation process and the superconductive properties were studied for the samples with the nominal compositions of Bi : Sr : Ca : Cu : Li = 2 : 1.5 : 1.5 : 2 : x(x=0 to 0.6). The samples were heated at 560-860°C for 1 to 48h in air. Monophasic Bi-2212 samples was obtained for x=0.2 to 0.6 by heating above 730°C, which was approximately 100°C lower than that of the sample with x=0. A new compound containing Li element was formed in the temperature range between 700 and 720°C, which remarkably promoted the formation of the Bi-2212 phase. The lattice parameter c of the Bi-2212 phase increase with increasing Li content. The temperature dependence of magnetic susceptibility showed that Tc rose up to 90K for the sample with x=0.4 heated at 750°C for 12h.

KW - 2212 phase

KW - Formation process

KW - Lattice parameter

KW - Li-addittion

KW - Oxygen content

KW - Tc

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The formation process of Li-added Bi-2212 phase

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Keywords

ASJC Scopus subject areas

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