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Preparation of Dense MgB 2 Bulk Superconductors by Spark Plasma Sintering
Author(s) -
Lee SooYong,
Yoo SangIm,
Kim YoungWoon,
Hwang g M.,
Kim DohYeon
Publication year - 2003
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2003.tb03559.x
Subject(s) - spark plasma sintering , materials science , microstructure , electrical resistivity and conductivity , superconductivity , sintering , magnetization , volume fraction , plasma , spark (programming language) , transition temperature , matrix (chemical analysis) , analytical chemistry (journal) , condensed matter physics , metallurgy , composite material , magnetic field , chemistry , nuclear physics , physics , computer science , programming language , chromatography , quantum mechanics
Fully dense MgB 2 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 MgB 2 matrix. A sharp superconducting transition with an onset temperature of 38.5 K was confirmed by both magnetization and resistivity measurements.