Ceramics-Silikáty 45, (2) 76 - 80 (2001) |
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INFLUENCE OF SILVER DOPING ON THE MICROSTRUCTURE AND MAGNETIC PROPERTIES OF YBa₂Cu₃O₇/Ag COMPOSITES
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Hoste Serge 1, Van Driessche Isabel 1, Bruneel Els 1,
Plesch Gustav 2,
Cigán Alexander 3,
Manka Jan 3
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1 Department of Inorganic and Physical Chemistry, University of Gent,
Krijgslaan 281 - S3, 9000 Gent, Belgium
2 Department of Inorganic Chemistry,
Faculty of Natural Sciences, Comenius University,
842 15 Bratislava, Slovak Republic
3 Institute of Measurement Science,
Slovak Academy of Sciences,
Dúbravska cesta 9, 842 19 Bratislava, Slovak Republic
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This paper describes the synthesis of a series of bulk samples with different silver content covering the whole range up to very
high loadings (0 - 80 wt.%). Although such high loadings are probably less relevant to fundamental phenomena, they may
have very high industrial significance. They are for instance required to increase the thermal conductivity of bulk materials
used in high power magnetron sputtering deposition techniques. The morphological characteristics of Ag-containing
composites are discussed are related to their superconducting properties which have been studied in detail using AC and DC
susceptometry at high and low field. The results exemplify the role of silver as synthetic flux at high temperatures and as
mediator of oxygen transport at lower temperatures in addition to its role of enhancer of mechanical and thermal properties. |
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