Bi-2223 precursor powders are prepared by both oxalate co-precipitation(CP) and spray pyrolysis(SP) methods.The influence of fabrication methods on the superconducting properties of Bi-2223 tapes are systematically st...
A nearly single-phased Bi-2223 sample with T_(c) 108K was studied by low-temperature powder x-ray diffraction.Several discontinuous changes of lattice parameters are observed around 245,160,125,100 and 20K.The most pr...
Supported by the National Center for Research and Development on Superconductivity of China,and the Foundation for Doctoral Education。
The effect of slow neutron irradiation at a low Auence of about 10^(8)n/cm^(2) on the microstructures of Bi-2223 polycrystalline samples was observed by transmission electron microscopy.By comparative study of the def...