超伝導YBa2Cu3Oxセラミクスの諸特性と空孔構造

概要

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The effects of pore structure on the characteristics of YBa2Cu3Ox superconducting ceramics was investigated. The density of YBa2Cu3Ox ceramics, which is related to pore size and surfaces, was controlled by calcining, milling and sintering condition. The density of samples ranging from 4.80 to 6.17g/cm3 was made by calcining temperature at 900-940°C, dry or wet mill and sintering temperature at 900-1000°C. The resistivity of samples in 300K decreased with increasing density up to 6.00g/cm3, increasing beyond that density and Tc were shift to a low temperature above 6. 00g/cm3. Inversely the critical current density increased with density, but it decreased in case of a magnified densification.
社団法人粉体粉末冶金協会の論文