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- W2016873792 abstract "We successfully prepared amorphous Bi-Pb-Sr-Ca-Cu-O spherical particles by a containerless melt solidification method. These particles were obtained by the melt solidification of Bi<SUB>2-x</SUB>Pb<SUB>x</SUB>Sr<SUB>2</SUB>CaCu<SUB>2</SUB>O<SUB>y</SUB> [(Bi,Pb)-2212] powder during the free-fall using a propane gas torch. The diameter of these particles was about 100 micrometers . The crystalline (Bi,Pb)-2212 superconductors were obtained by the transformation from the amorphous state under several oxygen partial pressures. (Bi,Pb)-2212 phase was formed via (Bi,Pb)<SUB>2</SUB>Sr<SUB>2</SUB>CuO<SUB>y</SUB> phase for all P<SUB>02</SUB> values. Low P<SUB>02</SUB> was more effective to introduce Pb into Bi<SUB>2</SUB>Sr<SUB>2</SUB>CaCu<SUB>2</SUB>O<SUB>y</SUB> lattice and only the heat treatment under P<SUB>02</SUB> equals 0.01 atm was successful in obtaining Pb-rich (Bi,Pb)-2212 with modulation-free structure. The critical composition separating Pb-poor modulated and Pb-rich modulation-free structures in (Bi,Pb)- 2212 was x equals 0.5. However, no lamellar structure composed of modulated and modulation-free regions was present in any particles for all P<SUB>02</SUB> values. Enhancement of critical current density was obtained by the Pb substitution." @default.
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- W2016873792 date "1999-07-06" @default.
- W2016873792 modified "2023-09-23" @default.
- W2016873792 title "Microstructure and superconducting properties of Bi2-xPbxSr2CaCu2Oy spherical particles transformed from an amorphous state prepared by a containerless melt solidification method" @default.
- W2016873792 doi "https://doi.org/10.1117/12.351283" @default.
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