Preparation of Dense MgB2 Bulk Superconductors by Spark Plasma Sintering

Fully dense MgB2 bulk specimens (∼higher than 99% dense) were prepared using spark plasma sintering (SPS) at 1250°C for 15 min. Microstructure analyses revealed that faceted MgO particles of ∼8% volume fraction were dispersed in the MgB2 matrix. A sharp superconducting transition with an onset tempe...

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Veröffentlicht in:	Journal of the American Ceramic Society 2003-10, Vol.86 (10), p.1800-1802
Hauptverfasser:	Lee, Soo-Yong, Yoo, Sang-Im, Kim, Young-Woon, Hwang, Nong M., Kim, Doh-Yeon
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Electrotechnical and electronic ceramics Exact sciences and technology microstructure spark plasma sintering superconductors Technical ceramics
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Zusammenfassung:	Fully dense MgB2 bulk specimens (∼higher than 99% dense) were prepared using spark plasma sintering (SPS) at 1250°C for 15 min. Microstructure analyses revealed that faceted MgO particles of ∼8% volume fraction were dispersed in the MgB2 matrix. A sharp superconducting transition with an onset temperature of 38.5 K was confirmed by both magnetization and resistivity measurements.
ISSN:	0002-7820 1551-2916
DOI:	10.1111/j.1151-2916.2003.tb03559.x