Effect of chemical degradation on superconducting properties of the HTSC ceramics |
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| Authors: | L I Afanasiadi A B Blank L A Kvichko L A Kotok Yu G Litvinenko E T Moghilko Z M Nartova V A Pavlyuk A S Pirogov I V Pulyayeva S G Sheshina |
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| Affiliation: | (1) Institute for Single Crystals, Lenin av. 60, 310141 Kharkov, USSR |
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| Abstract: | The effect of humid atmosphere (59 and 86%) on phase composition and properties of YBa2Cu3O7−y
powder and ceramics prepared by hot pressing has been studied. It has been found that with increase of water content in the
powder to 1·6 mass.% the superconducting properties of the corresponding ceramics gradually improve; on further increase of
the water content the ceramics degrade resulting in a complete loss of superconductivity. The observed phenomenon can be explained
by a plastifying effect of water on the powder by hot pressing on the one hand and by a solid-phase reaction of the products
of decomposition (1-2-3) at a high temperature annealing, on the other. |
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| Keywords: | Humidity highT c powders hot pressing ceramics |
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