The synthesis, microstructure, transport and magnetic properties of Bi-based low density HTSC

摘要

HTSC Bi_(1.8)Pb_(0.3)Sr_2Ca_2Cu_3O_x of low density has been synthesized and its structural and physical properties have been studied. Scanning electron microscopy (SEM) image shows that the material obtained has porous "foam" structure. The levitation force measured for the porous Bi_(1.8)Pb_(0.3)Sr_2Ca_2Cu_3O_x is appeared to be approximately the same as for polycrystalline YBCO of high density. These "foam" structures may be an ideal material for some practical applications of HTSCs in bulk form.