  Fe-clad BaxK1-xFe2As2 superconducting tapes were fabricated by the ex situ
powder-in-tube method combined with a short high-temperature annealing
technique. The effect of annealing time and different dopants on the transport
properties of the BaxK1-xFe2As2 tapes were systematically studied. By co-doping
with Ag and Pb, the transport critical current density Jc of BaxK1-xFe2As2
tapes was significantly improved in whole field region and the highest
transport Jc was up to 1.4x10^4 A/cm^2 (Ic=100 A) at 4.2K in self field. It is
proposed that the superior Jc in the co-doped samples are due to the combine
effect of Pb doping at low fields and Ag doping at high fields.
