Rev.Adv.Mater.Sci. (RAMS)
No 2, Vol. 28, 2011, pages 181-184

SUPERCONDUCTING PROPERTIES OF SPARK PLASMA SINTERED MgB2

Jiwhan Park and Jung-Ho Ahn

Abstract

Bulk MgB2(+C) was prepared via in-situ or ex-situ reaction during conventional sintering or spark-plasma sintereing (SPS). The SPSed samples resulted in a much higher densification than the sintered one. As a result, higher the critical current densiy values were reported for the SPS samples. In-situ reacted SPS samples generally exhibited a higher critical density than the ex-situ processed ones at low magnetic fields, but degradaded more quickly at higher fields than 3 T. The ex-situ reacted SPS samples with 5% excess C showed the critical current density up to 18,000 A/cm2 at 5 T (5K).

full paper (pdf, 432 Kb)