Synthesis of Bi‐Pb‐Sr‐Ca‐Cu oxide/Ag superconductors by melt dipping and oxidation of metallic precursor alloys
作者:
W. Gao,
S‐C. Li,
D. A. Rudman,
G. J. Yurek,
J. B. Vander Sande,
期刊:
Applied Physics Letters
(AIP Available online 1989)
卷期:
Volume 55,
issue 21
页码: 2227-2229
ISSN:0003-6951
年代: 1989
DOI:10.1063/1.102353
出版商: AIP
数据来源: AIP
摘要:
Bi‐Pb‐Sr‐Ca‐Cu‐Ag alloy coatings were made by vacuum induction melting followed by melt dipping on substrates of MgO, SrTiO3, and Al2O3. The metallic precursor layers were then subjected to a controlled atmosphere oxidation and annealing to produce oxide superconductors. Superconducting coatings with onset temperatures of 112 K and zero resistance temperatures of 80 K were obtained in this way. The addition of Ag aided in the alloy melting and dipping processes, and produced a superconducting oxide/noble metal composite after oxidation. The resulting superconducting phases were analyzed by x‐ray powder diffraction. The influence of the substrate, dipping processes, oxidation, and annealing conditions on the superconducting properties are discussed.
点击下载:
PDF
(283KB)
返 回