Investigations of PbO-modified Bi-Sr-Ca-Cu-O superconductors by Auger electron spectroscopy
| Autor: | A Zalar, E W Seibt, S Bernik, M Hrovat |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Superconductivity
Auger electron spectroscopy Materials science Superconducting material Metals and Alloys Analytical chemistry chemistry.chemical_element Calcium Condensed Matter Physics Oxygen Bismuth chemistry visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Grain boundary Ceramic Electrical and Electronic Engineering |
| Zdroj: | Superconductor Science and Technology. 3:409-413 |
| ISSN: | 1361-6668 0953-2048 |
| DOI: | 10.1088/0953-2048/3/8/004 |
| Popis: | High-temperature superconducting ceramic with the nominal composition Bi2Pb0.5Sr2Ca2.5Cu3.5Ox was prepared by firing at different temperatures and investigated by high-resolution Auger electron spectroscopy (AES). The ceramic material was inhomogeneous with a higher concentration of calcium at the grain boundaries. Generally, the differences in concentration of calcium are less pronounced for ceramics fired at higher temperatures. In PbO-modified Bi-Sr-Ca-Cu-O superconducting material lead was observed mainly at the grain boundaries. Depth profiling through the grain boundaries of Bi-Sr-Ca-Cu-O material fired at higher temperatures reversed the concentration variation of bismuth and oxygen. |
| Databáze: | OpenAIRE |
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