In:
Journal of Materials Science: Materials in Electronics, Springer Science and Business Media LLC, Vol. 33, No. 14 ( 2022-05), p. 11257-11268
Abstract:
In this work, ex situ MgB 2 was mixed with 0.5 mol of Mg and sintered. The sintering conditions were varied over a temperature range of 600–1000 °C for 1, 3, and 7 h, respectively. The addition of Mg during the sintering increased the partial pressure of Mg and thus suppressed the decomposition of MgB 2 . Onset of critical temperature, T c, was retained at ∼ 38 K even after the addition of Mg. By increasing the sintering temperature, magnetic critical current density, J c at self-field, and 20 K of the ex situ samples increased consistently. With the addition of Mg for 1 h sintering, self-field J c (20 K) was enhanced more than 20 times to 10 4 A cm −2 as the sintering temperature was increased. Such significant enhancement in the J c is mainly due to the improved grain coupling aided by Mg during the short sintering.
Type of Medium:
Online Resource
ISSN:
0957-4522
,
1573-482X
DOI:
10.1007/s10854-022-08101-3
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2022
detail.hit.zdb_id:
2016994-2
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