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Effect of the annealing time on the Pb concentration and phase composition of samples from the Bi-Pb-Sr-Ca-Cu-O system

Journal Article


Abstract


  • The superconducting material with a nominal composition Bi1.6Pb0.4Sr2Ca2Cu3Oy has been synthesised. The annealing time varied from 18 to 168 h for the different tests. It is established that the increase of annealing time leads to a reduction in Pb content and an increase in the volume of the 110 K 2223 phase, in relation to the 85 K 2212 phase. The results of the investigation indicate that the introduction of Pb in the crystal lattice hardly contributes to the increase in 2223 phase. A more probable explanation is that Pb causes the formation of a medium that helps the transformation of the 2212 phase into the 2223 phase. © 1990 IOP Publishing Ltd.

Publication Date


  • 1990

Citation


  • Konstantinov, K., Karbanov, S., Souleva, A., & Kovacheva, D. (1990). Effect of the annealing time on the Pb concentration and phase composition of samples from the Bi-Pb-Sr-Ca-Cu-O system. Superconductor Science and Technology, 3(6), 309-311. doi:10.1088/0953-2048/3/6/009

Scopus Eid


  • 2-s2.0-11644299187

Start Page


  • 309

End Page


  • 311

Volume


  • 3

Issue


  • 6

Abstract


  • The superconducting material with a nominal composition Bi1.6Pb0.4Sr2Ca2Cu3Oy has been synthesised. The annealing time varied from 18 to 168 h for the different tests. It is established that the increase of annealing time leads to a reduction in Pb content and an increase in the volume of the 110 K 2223 phase, in relation to the 85 K 2212 phase. The results of the investigation indicate that the introduction of Pb in the crystal lattice hardly contributes to the increase in 2223 phase. A more probable explanation is that Pb causes the formation of a medium that helps the transformation of the 2212 phase into the 2223 phase. © 1990 IOP Publishing Ltd.

Publication Date


  • 1990

Citation


  • Konstantinov, K., Karbanov, S., Souleva, A., & Kovacheva, D. (1990). Effect of the annealing time on the Pb concentration and phase composition of samples from the Bi-Pb-Sr-Ca-Cu-O system. Superconductor Science and Technology, 3(6), 309-311. doi:10.1088/0953-2048/3/6/009

Scopus Eid


  • 2-s2.0-11644299187

Start Page


  • 309

End Page


  • 311

Volume


  • 3

Issue


  • 6