Bi(2223)/Ag tapes with CrO3 doping have been fabricated by Powder-in-Tube (
PIT) method. It is found that a small amount of CrO3 doping improves the fl
ux pinning, with the effective pinning center due to Cr substitution for Cu
, while excessive Cr-ion doping degrades the superconductivity of Bi(2223).
XRD analysis shows that a small amount of CrO3 addition has no effect on t
he phase composition of Bi(2223)/Ag tape. SEM micrographs of Bi(2223) tapes
do not show a distinct difference between the pure sample and CrO3 doped s
amples (x less than or equal to 0.4%).