Structure evolution in high-Tc Bi-based superconductors with Pb doping revealed by electron microscopy

Influence of Ca2PbO4 on Phase Formation and Electrical Properties of (Bi,Pb)2Sr2Ca2Cu3O10/Ag Superconducting Composites

“…7,31 J c of both tapes dropped with sintering beyond the maximum due to unhealed cracks introduced by mechanical deformation, as well as formation of an amorphous phase with prolonged sintering time. [32][33][34] Another important property of Bi2223/Ag tapes is the J c behavior in an external magnetic field (H). In this work, the J c -H behavior of tapes I and II was measured with a magnetic field applied parallel (Hʈab) and perpendicular (HЌab) to the broad surface of the tape.…”

Microstructures in high‐Tc Bi(Pb)‐family 2212 superconductors as revealed by scanning and transmission electron microscopy

“…The magnetization strongly depended on the preparation condition; it decreased after a long heating period, although the volume of a 2223 phase remained almost unchanged (Ben-dor et al, 1990). Based on high-resolution transmission electron microscopy it was clarified that many thin layers of Ca-rich amorphous phase are formed between the 2223 grains (Wu et al, 1992).…”

“…This is the case especially for recent high-Tc superconductors (Boekholt et al, 1991;Horiuchi et al, 1989Horiuchi et al, ,1990Lee et al, 1992;Wu et al, 1992). It is therefore very important to characterize the microstructures of these materials, if possible, on an atomic scale.…”

“…It is therefore very important to characterize the microstructures of these materials, if possible, on an atomic scale. A series of Bi(Pb)-family superconductors, which were prepared by the sol-gel method, have been examined (Wu et al, 1992). The magnetization strongly depended on the preparation condition; it decreased after a long heating period, although the volume of a 2223 phase remained almost unchanged (Ben-dor et al, 1990).…”