Dopants in high-Tc superconductors from rapidly quenched Bi1.6Pb0.4Ca2Sr2Cu3OW glasses

High Tc superconductors with a variety of metal dopants (M = V, Nb, Mo, Te, Ta and W, ordered by atomic number) were prepared by the heat treatment of rapidly quenched glass precursors. The optimum heat-treatment temperature, Topt, was observed in all the glass-derived superconductors with different...

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Published inJournal of materials science Vol. 28; no. 15; pp. 4193 - 4196
Main Authors TATSUMISAGO, M, INOUE, S, TOHGE, N, MINAMI, T
Format Journal Article
LanguageEnglish
Published Heidelberg Springer 01.01.1993
Subjects
Applied sciences
Building materials. Ceramics. Glasses
Chemical industry and chemicals
Exact sciences and technology
Glass-ceramics
Glasses
Heat treatment
Electrical conductivity
Electrical properties
Crystallization
Temperature effect
Differential thermal analysis
Manufacturing
Glass ceramics
X ray diffraction
High temperature superconductor
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Summary:High Tc superconductors with a variety of metal dopants (M = V, Nb, Mo, Te, Ta and W, ordered by atomic number) were prepared by the heat treatment of rapidly quenched glass precursors. The optimum heat-treatment temperature, Topt, was observed in all the glass-derived superconductors with different dopants; in all cases Tc (zero) higher than 105 K was observed on heat treatment at Topt for each dopant. Topt was related to the temperature at which a partial melting of the specimen occurred, as determined by differential thermal analyses. The dopants lower the partial melting temperature and thus lower Topt for the formation of the 110 K phase. 16 refs.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-2461
1573-4803
DOI:10.1007/BF00351253