Effects of oxygen partial pressure and mechanical deformation on (Tl,Pb)(Ba,Sr)/sub 2/Ca/sub 2/Cu/sub 3/O/sub y/ Ag-sheathed tapes
| Autor: | E. J. Peterson, Pradeep Haldar, B.L. Bingham, James A. Voigt, K.V. Salazar, E.P. Roth, J.Y. Coulter, Terry G. Holesinger, R.J. Sebring |
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| Rok vydání: | 1995 |
| Předmět: |
Materials science
High-temperature superconductivity Coprecipitation Annealing (metallurgy) Analytical chemistry chemistry.chemical_element Partial pressure Condensed Matter Physics Microstructure Oxygen Electronic Optical and Magnetic Materials law.invention chemistry law Impurity Electrical and Electronic Engineering Stoichiometry |
| Zdroj: | IEEE Transactions on Appiled Superconductivity. 5:1494-1497 |
| ISSN: | 1051-8223 |
| DOI: | 10.1109/77.402850 |
| Popis: | The powder in tube method was used to produce silver sheathed tapes of Tl/sub 0.78/Pb/sub 0.5/Ba/sub 0.4/Sr/sub 1.6/Ca/sub 2/Cu/sub 3/O/sub y/. A precursor powder of Pb/sub 0.5/Ba/sub 0.4/Sr/sub 1.6/Ca/sub 2/Ca/sub 3/O/sub y/ (prepared via the hydroxycarbonate coprecipitation of the metal ions from a stoichiometric nitrate solution) was thallinated and packed into a silver tube and processed into tape. The tape was then heated (in 100% oxygen or air) from 840/spl deg/C by 870/spl deg/C for various anneal times. The effects of different intermediate pressing stresses during tape processing had dramatic effects on both the current-carrying capacity and the tape microstructure. Variation of pO/sub 2/ also led to differences in current-carrying capacity I/sub c/ as did a roll substituted for a press during tape processing. > |
| Databáze: | OpenAIRE |
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