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Melting Equilibria of the 223 (Bi,Pb)-Sr-Ca-Cu) High Tc Superconductor in Oxygen

Published

Author(s)

Winnie K. Wong-Ng, Lawrence P. Cook

Abstract

Melting information for the Pb-doped 2223 high Tc phase in the Bi(Pb)-Sr-Ca-Cu-O system is important for the superconducting wire and tape industry. This paper examines the melting equilibria of a composition Bi1.8Pb0.4Sr2Ca2.2Cu3Ox under oxygen. The subsolidus multiphase volume consists of 2223, (Ca,Sr)2PbO4 (1x20), 2212, (Sr,Ca)14Cu24O41 (014x24), and (Ca,Sr)d2CuO3 (0x21). This multiphase volume is also one member of the 29 five-phase volume set prepared under 7.5% O2 that contains 2223. A procedure which involves the combined use of DTA/TGA, He/Liquid N2 Quenching methods, powder x-ray diffraction, SEM/EDS, and a wicking technique to capture the melt for performing quantitiative microchemical analysis were employed for this investigation.
Citation
Pervoskite Oxides for Electronic Energy Conversion and Energy, Ceramic Transactions 104, Eds. W. Wong-Ng, T. Holesinger, G.N. Riley and R. Guo
Publisher Info
American Ceramic Society, Westerville, OH

Keywords

high T<sub>c</sub> 2223 superconducting, melt sequence, melting equilibria, oxygen atmosphere

Citation

Wong-Ng, W. and Cook, L. (2000), Melting Equilibria of the 223 (Bi,Pb)-Sr-Ca-Cu) High T<sub>c</sub> Superconductor in Oxygen, American Ceramic Society, Westerville, OH (Accessed July 22, 2024)

Issues

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Created April 17, 2000, Updated February 19, 2017