We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Effect of high-pressure compaction on the properties of Tl<sub>2</sub>Ba<sub>2</sub>CaCu<sub>2</sub>O<sub> y </sub>F<sub> x </sub> ( x = 0, 0.1, 0.2) ceramics.
- Authors
Akimov, A. I.; Lebedev, S. A.; Tarasevich, T. V.; Ignatenko, O. V.
- Abstract
Tl2Ba2CaCu2O y F x ( x = 0, 0.1, 0.2) high- T c ceramics have been prepared using high-pressure compaction. Their phase composition and electrical properties have been studied, and their crystal structure have been refined by the Rietveld method. The results demonstrate that high-pressure compaction makes it possible to reduce the synthesis temperature of Tl2Ba2CaCu2O y F x ceramics from 840 to 825°C and to obtain more structurally perfect materials, with a higher density and narrower superconducting transition (4–7 K). With increasing fluorine content, the carrier (hole) concentration in the Tl2Ba2CaCu2O y F x ceramics decreases, leading to changes in their superconducting transition temperature. The Cu-Cu bond distance and CuO2-Ba interplanar spacing are proposed as key parameters for T c control.
- Subjects
HIGH pressure (Technology); COMPACTING; COMPRESSIBILITY; CERAMICS; PROPERTIES of matter; RIETVELD refinement
- Publication
Inorganic Materials, 2008, Vol 44, Issue 3, p319
- ISSN
0020-1685
- Publication type
Article
- DOI
10.1134/S0020168508030205