Title :
Preparation and superconducting properties of Bi2223 thick films by the doctor-blade process
Author :
Yoshikawa, K. ; Hirabayashi, J. ; Ikeda, Hinata ; Yoshizaki, R.
Author_Institution :
Supercond. Res. Lab., ISTEC, Tokyo, Japan
fDate :
6/1/1995 12:00:00 AM
Abstract :
For this feasibility study, superconductor/silver/PSZ (partial-stablized-zirconia) composite samples with a superconductor composition of Bi/sub 1.84/Pb/sub 0.34/Sr/sub 1.91/Ca/sub 2.03/Cu/sub 3.06/O/sub y/ (2223), were fabricated via the doctor-blade technique. It was found that the densification and alignment of 2223 grains along the composite interface was crucial to achieving high critical current densities (J/sub c/). The effects of heat treatment and uniaxial hot pressing pressure were investigated to develop a scheme to maximize J/sub c/. The highest zero-field J/sub c/ value of 3/spl times/10/sup 7/A/m/sup 2/ at 77 K was obtained in a uniaxial hot pressing at 1108 K.<>
Keywords :
bismuth compounds; calcium compounds; composite superconductors; critical current density (superconductivity); densification; heat treatment; high-temperature superconductors; hot pressing; lead compounds; materials preparation; powder technology; strontium compounds; thick films; 1108 K; 2223 grains alignment; 77 K; Bi/sub 1.84/Pb/sub 0.34/Sr/sub 1.91/Ca/sub 2.03/Cu/sub 3.06/O; Bi/sub 1.84/Pb/sub 0.34/Sr/sub 1.91/Ca/sub 2.03/Cu/sub 3.06/O/sub y/; Bi2223 thick films; composite interface; composite samples; densification; doctor-blade process; heat treatment; high critical current densities; high temperature superconductors; highest zero-field J/sub c/; material preparation; partial-stablized-zirconia; superconducting properties; uniaxial hot pressing; Bismuth compounds; Critical current density; Magnetic films; Pressing; Scanning electron microscopy; Silver; Superconducting films; Superconductivity; Thick films; X-ray scattering;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
