Abstract

To investigate effect of a technological scheme on the structure and superconducting parameters of powder composites YBaCuO-Ag, three types of pressing of powder mixtures were used, i.e. static, hot, and dynamic pressing. Silver content changed in the range c=0-50 vol.%. Orthorhombicity degree, b/a, of the YBaCuO-ceramics proved to be practically independent on c up to c=30 vol.% for static and hot pressing, and it decreased appreciably even at small c values in the case of dynamically pressed samples. Critical temperature T/sub c/ and transport critical current density j/sub c/ show similar behaviour with maximum about c=10 vol.% for static and hot pressing. Dynamic pressing results in significant deterioration of these parameters. >

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