Abstract
In order to improve superconducting property of Bi-2223 superconductor bulk, Ag wires were composed in the bulk. The composite was made by stacking alternately Ag wires and the calcined powder. The sample was sintered at 840 °C for 50 h in air. After treatment with a cold isostatic press as an intermediate pressing, the sample was sintered again. The maximum J c at 4.2 K and self-field of the sample composed with 24 Ag wires of 0.4 mm in diameter was obtained to be 2000 A/cm 2. Scanning electron microscope and electron probe microanalyzer observation results showed that highly c-axis oriented and densely structured Bi-2223 plate-like grains could be formed around the interfacial region between the superconducting oxide and the metal Ag.
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