Grain growth enhancement in silver-doped YBa2Cu3O7−x superconductor
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The effects of silver addition on the microstructural and superconducting properties of YBa2Cu3O7−x (YBCO) have been investigated. It was found that the microstructure of silver-doped YBCO samples is characterized by highly oriented platelet-like grains (up to 3 mm × 0.5 mm × 15 μm). The superconducting transition temperatureTitc (R= 0) is decreased with increasing wt% of silver. The critical transport density (JcT) is, however, found to be improved (up to two orders of magnitude) in the doped materials (JitcT (T= 77 K andH = 0 T) = 1250 Acm−2). It is believed that the addition of silver lowers the melting temperature of the system and thereby enhances the decomposition of the compound and promotes grain growth during solidification.
KeywordsPolymer Microstructure Melting Temperature Superconducting Property Growth Enhancement
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- 8.W. D. Macdonald, A. J. Otto, E. J. Zwartz, B. A. Judd andE. Batalla, in “Processing and Applications of High Titc Superconductors”, edited by W. E. Mayo (The Metallurgical Society, Rutgers University, N.J. 1988) p. 227.Google Scholar