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Effect of Ag-doping on the intergranular properties of the superconducting Bi-(Pb)-Sr-Ca-Cu-O system

โœ Scribed by Katsukuni Yoshida; Yasushi Sano; Yoichi Tomii

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
161 KB
Volume
194-196
Category
Article
ISSN
0921-4526

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โœฆ Synopsis

The effect of Ag-doping and of heat treatment on the superconducting properties have been investigated for sintered Bi-(Pb)-Sr-Ca-Cu-O ceramics consisting of the high-T c ( 2223) phase, where the samples were cooled at different rates immediately after the sintering. For undoped samples the impurity phases of ( 2212), Ca2PbO 4 and (3221) were produced, while for doped samples the impurity phases were only ( 2201) and ( 3221). This difference in phase precipitation markedly affects the intergranular properties between ( 2223) grains, as demonstrated by a diamagnetic measurement. This doping effect is enhanced by increasing the cooling rate after the sintering.

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