Excess Mg in situ powder addition for enhancing critical current density of ex situ MgB2
In this work, ex situ MgB2 bulks were added with (1.5 Mg + 2B) and sintered in an attempt to enhance its intergrain connectivity. The addition was varied within the range of 0–50 wt.%, and the sintering was undertaken at 700 °C, 800 °C, and 1000 °C, respectively, for 1 h. Superconducting critical te...
| Main Authors: | , , , , , , , |
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| Format: | Article |
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Springer
2022
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| Online Access: | http://psasir.upm.edu.my/id/eprint/101366/ |
| _version_ | 1848863546187710464 |
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| author | Mohd Hapipi, Nurhidayah Chen, Soo Kien Shaari, Abdul Halim Awang Kechik, Mohd Mustafa Lim, Kean Pah Tan, Kar Ban Lee, Oon Jew Miryala, Muralidhar |
| author_facet | Mohd Hapipi, Nurhidayah Chen, Soo Kien Shaari, Abdul Halim Awang Kechik, Mohd Mustafa Lim, Kean Pah Tan, Kar Ban Lee, Oon Jew Miryala, Muralidhar |
| author_sort | Mohd Hapipi, Nurhidayah |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | In this work, ex situ MgB2 bulks were added with (1.5 Mg + 2B) and sintered in an attempt to enhance its intergrain connectivity. The addition was varied within the range of 0–50 wt.%, and the sintering was undertaken at 700 °C, 800 °C, and 1000 °C, respectively, for 1 h. Superconducting critical temperature, Tc of the samples was determined to be around 38 K as shown by the temperature dependence of susceptibility measurement. It was found that critical current density, Jc increased with the increased amount of the addition. Jc was further enhanced to 2 × 104A cm2 (0 T, 20 K) as the sintering temperature was raised. The increase of Jc is due to improved grain coupling as a result of in situ formation of MgB2, which fills the voids and connects the ex situ MgB2 grains. Additionally, the grain coupling was further strengthened by solid-state self-sintering at higher temperatures. The increment of Jc was accompanied by a narrower width of double-step transition of Tc attributable to a more complete MgB2 phase formation of the samples as the sintering temperature was increased. |
| first_indexed | 2025-11-15T13:34:38Z |
| format | Article |
| id | upm-101366 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T13:34:38Z |
| publishDate | 2022 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1013662023-11-06T06:23:23Z http://psasir.upm.edu.my/id/eprint/101366/ Excess Mg in situ powder addition for enhancing critical current density of ex situ MgB2 Mohd Hapipi, Nurhidayah Chen, Soo Kien Shaari, Abdul Halim Awang Kechik, Mohd Mustafa Lim, Kean Pah Tan, Kar Ban Lee, Oon Jew Miryala, Muralidhar In this work, ex situ MgB2 bulks were added with (1.5 Mg + 2B) and sintered in an attempt to enhance its intergrain connectivity. The addition was varied within the range of 0–50 wt.%, and the sintering was undertaken at 700 °C, 800 °C, and 1000 °C, respectively, for 1 h. Superconducting critical temperature, Tc of the samples was determined to be around 38 K as shown by the temperature dependence of susceptibility measurement. It was found that critical current density, Jc increased with the increased amount of the addition. Jc was further enhanced to 2 × 104A cm2 (0 T, 20 K) as the sintering temperature was raised. The increase of Jc is due to improved grain coupling as a result of in situ formation of MgB2, which fills the voids and connects the ex situ MgB2 grains. Additionally, the grain coupling was further strengthened by solid-state self-sintering at higher temperatures. The increment of Jc was accompanied by a narrower width of double-step transition of Tc attributable to a more complete MgB2 phase formation of the samples as the sintering temperature was increased. Springer 2022-09-24 Article PeerReviewed Mohd Hapipi, Nurhidayah and Chen, Soo Kien and Shaari, Abdul Halim and Awang Kechik, Mohd Mustafa and Lim, Kean Pah and Tan, Kar Ban and Lee, Oon Jew and Miryala, Muralidhar (2022) Excess Mg in situ powder addition for enhancing critical current density of ex situ MgB2. Applied Physics A, 128 (10). art. no. 913. pp. 1-14. ISSN 0947-8396; ESSN: 1432-0630 https://link.springer.com/article/10.1007/s00339-022-06060-4#citeas 10.1007/s00339-022-06060-4 |
| spellingShingle | Mohd Hapipi, Nurhidayah Chen, Soo Kien Shaari, Abdul Halim Awang Kechik, Mohd Mustafa Lim, Kean Pah Tan, Kar Ban Lee, Oon Jew Miryala, Muralidhar Excess Mg in situ powder addition for enhancing critical current density of ex situ MgB2 |
| title | Excess Mg in situ powder addition for enhancing critical current density of ex situ MgB2 |
| title_full | Excess Mg in situ powder addition for enhancing critical current density of ex situ MgB2 |
| title_fullStr | Excess Mg in situ powder addition for enhancing critical current density of ex situ MgB2 |
| title_full_unstemmed | Excess Mg in situ powder addition for enhancing critical current density of ex situ MgB2 |
| title_short | Excess Mg in situ powder addition for enhancing critical current density of ex situ MgB2 |
| title_sort | excess mg in situ powder addition for enhancing critical current density of ex situ mgb2 |
| url | http://psasir.upm.edu.my/id/eprint/101366/ http://psasir.upm.edu.my/id/eprint/101366/ http://psasir.upm.edu.my/id/eprint/101366/ |