Effect of Sintering Time on the Optimal Synthesis Condition in MgB                         
                        2

J. Ishiwata; Muralidhar Miryala; N. Koshizuka; Kazuo Inoue; Masato Murakami

doi:10.1016/j.phpro.2014.09.037

Effect of Sintering Time on the Optimal Synthesis Condition in MgB ₂

J. Ishiwata, Muralidhar Miryala, N. Koshizuka, Kazuo Inoue, Masato Murakami

Research output: Contribution to journal › Conference article

Abstract

The present investigation has focused on methods to improve the critical current density (J _c ) of the disk-shape bulk MgB ₂ superconductor by optimizing sintering conditions. The samples have been synthesized using a two-step process. The samples are sintered at 775 ^o C for 3 h in pure argon atmosphere, followed by re-sintering at 660 ^o C for 24 to 100 hours. X-ray diffraction showed that all the samples re-sintered are single phase and homogenous. The magnetization measurements confirm a sharp superconducting transition with T _c (onset) at around 37 K. The critical current density (J _c ) for MgB ₂ samples increases with increasing the re-sintering time at 660 ^o C, in that the highest J _c value of 170 kA/cm ² at 20 K was obtained in the sample re-sintered at 660 ^o C for 100 h.

Original language	English
Pages (from-to)	102-105
Number of pages	4
Journal	Physics Procedia
Volume	58
DOIs	https://doi.org/10.1016/j.phpro.2014.09.037
Publication status	Published - 2013 Jan 1
Event	26th International Symposium on Superconductivity, ISS 2013 - Tokyo, Japan Duration: 2013 Nov 18 → 2013 Nov 20

Keywords

critical current density (J )
MgB
two-step process
x-ray diffraction

ASJC Scopus subject areas

Physics and Astronomy(all)

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Ishiwata, J., Miryala, M., Koshizuka, N., Inoue, K., & Murakami, M. (2013). Effect of Sintering Time on the Optimal Synthesis Condition in MgB ₂ Physics Procedia, 58, 102-105. https://doi.org/10.1016/j.phpro.2014.09.037

Effect of Sintering Time on the Optimal Synthesis Condition in MgB ₂ . / Ishiwata, J.; Miryala, Muralidhar; Koshizuka, N.; Inoue, Kazuo; Murakami, Masato.

In: Physics Procedia, Vol. 58, 01.01.2013, p. 102-105.

Research output: Contribution to journal › Conference article

Ishiwata, J, Miryala, M, Koshizuka, N, Inoue, K & Murakami, M 2013, ' Effect of Sintering Time on the Optimal Synthesis Condition in MgB ₂ ', Physics Procedia, vol. 58, pp. 102-105. https://doi.org/10.1016/j.phpro.2014.09.037

Ishiwata J, Miryala M, Koshizuka N, Inoue K, Murakami M. Effect of Sintering Time on the Optimal Synthesis Condition in MgB ₂ Physics Procedia. 2013 Jan 1;58:102-105. https://doi.org/10.1016/j.phpro.2014.09.037

Ishiwata, J. ; Miryala, Muralidhar ; Koshizuka, N. ; Inoue, Kazuo ; Murakami, Masato. / Effect of Sintering Time on the Optimal Synthesis Condition in MgB ₂ In: Physics Procedia. 2013 ; Vol. 58. pp. 102-105.

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title = " Effect of Sintering Time on the Optimal Synthesis Condition in MgB 2 ",

abstract = " The present investigation has focused on methods to improve the critical current density (J c ) of the disk-shape bulk MgB 2 superconductor by optimizing sintering conditions. The samples have been synthesized using a two-step process. The samples are sintered at 775 o C for 3 h in pure argon atmosphere, followed by re-sintering at 660 o C for 24 to 100 hours. X-ray diffraction showed that all the samples re-sintered are single phase and homogenous. The magnetization measurements confirm a sharp superconducting transition with T c (onset) at around 37 K. The critical current density (J c ) for MgB 2 samples increases with increasing the re-sintering time at 660 o C, in that the highest J c value of 170 kA/cm 2 at 20 K was obtained in the sample re-sintered at 660 o C for 100 h. ",

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AB - The present investigation has focused on methods to improve the critical current density (J c ) of the disk-shape bulk MgB 2 superconductor by optimizing sintering conditions. The samples have been synthesized using a two-step process. The samples are sintered at 775 o C for 3 h in pure argon atmosphere, followed by re-sintering at 660 o C for 24 to 100 hours. X-ray diffraction showed that all the samples re-sintered are single phase and homogenous. The magnetization measurements confirm a sharp superconducting transition with T c (onset) at around 37 K. The critical current density (J c ) for MgB 2 samples increases with increasing the re-sintering time at 660 o C, in that the highest J c value of 170 kA/cm 2 at 20 K was obtained in the sample re-sintered at 660 o C for 100 h.

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