Abstract
Highly anisotropic Particles of Tl-1212, Tl-2212, Tl-1223 and Tl-2223 superconductors were grown. The Tl-free precursor powders with the compositions Ba1Ca2Cu3Ag0.37O6 and Ba2Ca2Cu3Ag0.37O7were prepared using an aerosol flow reactor. These precursor powders were then post-annealed in 0.1 atm oxygen at 700 “C for 4h to reduce the carbon present and mixed with T12O3 (typical composition of TlX; x = 0.6-1.0). The Tl-containing powders were heated in sealed gold tubes between 650-890 °C for various times. X-ray diffraction showed that the TL-2212 and Tl-2223 phases were stable over a wide range of temperatures. Scanning electron microscopy showed evidence for the presence of high aspect-ratio particles. These highly anisotropic particles may of interest for the preparation of powder-in-tube and other powder deposited conductors, for current leads, and for grain alignment studies.
| Original language | English |
|---|---|
| Pages (from-to) | 1490-1493 |
| Number of pages | 4 |
| Journal | IEEE Transactions on Applied Superconductivity |
| Volume | 5 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jun 1995 |
Funding
This work was sponsored by the Division of Materials Sciences, Office of Basic Energy Sciences, US Department of Energy and technology develop meut was funded by the US Deprtnmt of Energy Office of Advanced Utility Co~icept-Superco~iductoTr echnology Program, both under contract DE-AC05-840R21400 with Martin Marietta Energy Systems, Inc. This work was also supported by the Oak Ridge National Laboratory Postdoctoral Research Program, administered jointly by the ORISE and ORNL.
| Funders | Funder number |
|---|---|
| Office of Basic Energy Sciences | |
| US Department of Energy | |
| US Deprtnmt of Energy Office of Advanced Utility Co~icept-Superco~iductoTr echnology Program | DE-AC05-840R21400 |
| Oak Ridge National Laboratory | |
| Oak Ridge Institute for Science and Education | |
| Division of Materials Sciences and Engineering |