Title :
Effect of MgO particles on microstructural development and superconducting properties of Bi-2223 phase
Author :
Jaimoo Yoo ; Jae-Woong Ko ; Jian Sha ; Hai-Doo Kim ; Hyungsik Chung
Author_Institution :
Korea Inst. of Machinery & Metals, Changwon, South Korea
fDate :
6/1/1995 12:00:00 AM
Abstract :
The effect of an inert second phase on microstructural development and superconducting properties has been studied in order to improve the J/sub c/ value under magnetic field. 100 /spl Aring/ MgO particles were homogeneously mixed with the Bi-2223 phase using planetary ball milling and ultrasonification. The reaction sequence has been traced using X-ray diffraction technique and microstructural development has been studied using SEM and EPMA. Homogeneous distribution MgO grains in Bi-2223 phase led to the increase in J/sub c/ under magnetic field possibly due to the introduction of flux pinning sites.<>
Keywords :
X-ray diffraction; bismuth compounds; calcium compounds; critical current density (superconductivity); crystal microstructure; flux pinning; high-temperature superconductors; magnesium compounds; scanning electron microscopy; strontium compounds; 100 A; Bi-2223 phase; Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/:MgO; EPMA; MgO particles; SEM; X-ray diffraction; critical current density; flux pinning sites; high temperature superconductor; inert second phase; microstructural development; planetary ball milling; reaction sequence; superconducting properties; ultrasonification; Bismuth compounds; Ceramics; Creep; Flux pinning; Magnetic field measurement; Magnetic fields; Magnetic materials; Magnetic properties; Superconductivity; Temperature;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
