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Effects of Annealing Treatment of Superconductivity in Powder Sintered YBCO

Tang, X. D. / Wang, J. R. / Xiong, S. G. / Xu, J. R. / Guo, G. R. / Zhou, L.

Abstract The effects of annealing treatment on superconducting properties of YBCO bulk samples prepared by powder sintering have been reported and discussed. In the annealing temperature (TA range from 525 to 750°C, the sample with a single Tc component and the highest Tc° and Tc° can be obtained only by annealing at 750°C. When TA =750°C the bulk samples consist of two Tc components (higher and lower Tc components). Tc° of the higher Tc component and Tc° of the lower Tc component increase with increase of TA . Jc has a parabolic dependence on TA and attains a peak when TA =700°C. The effect of annealing time (in the range of 4–36 h) on Jc and Tc is not too obvious for a given TA. A simple explanation for these effects is that the perfection of the one-dimensional (1-D) Cu-0 chains and 2-D CuO networks is related to annealing. A good superconductivity can be attained as long as the sample has the perfect 2-D Cu-O networks under the preconditon that the perfection of 1-D Cu-0 chains is above a given level.

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Effects of Annealing Treatment of Superconductivity in Powder Sintered YBCO

Tang, X. D. / Wang, J. R. / Xiong, S. G. / Xu, J. R. / Guo, G. R. / Zhou, L.

Abstract The effects of annealing treatment on superconducting properties of YBCO bulk samples prepared by powder sintering have been reported and discussed. In the annealing temperature (TA range from 525 to 750°C, the sample with a single Tc component and the highest Tc° and Tc° can be obtained only by annealing at 750°C. When TA =750°C the bulk samples consist of two Tc components (higher and lower Tc components). Tc° of the higher Tc component and Tc° of the lower Tc component increase with increase of TA . Jc has a parabolic dependence on TA and attains a peak when TA =700°C. The effect of annealing time (in the range of 4–36 h) on Jc and Tc is not too obvious for a given TA. A simple explanation for these effects is that the perfection of the one-dimensional (1-D) Cu-0 chains and 2-D CuO networks is related to annealing. A good superconductivity can be attained as long as the sample has the perfect 2-D Cu-O networks under the preconditon that the perfection of 1-D Cu-0 chains is above a given level.

Effects of Annealing Treatment of Superconductivity in Powder Sintered YBCO

Tang, X. D. / Wang, J. R. / Xiong, S. G. / Xu, J. R. / Guo, G. R. / Zhou, L.

Abstract The effects of annealing treatment on superconducting properties of YBCO bulk samples prepared by powder sintering have been reported and discussed. In the annealing temperature (TA range from 525 to 750°C, the sample with a single Tc component and the highest Tc° and Tc° can be obtained only by annealing at 750°C. When TA =750°C the bulk samples consist of two Tc components (higher and lower Tc components). Tc° of the higher Tc component and Tc° of the lower Tc component increase with increase of TA . Jc has a parabolic dependence on TA and attains a peak when TA =700°C. The effect of annealing time (in the range of 4–36 h) on Jc and Tc is not too obvious for a given TA. A simple explanation for these effects is that the perfection of the one-dimensional (1-D) Cu-0 chains and 2-D CuO networks is related to annealing. A good superconductivity can be attained as long as the sample has the perfect 2-D Cu-O networks under the preconditon that the perfection of 1-D Cu-0 chains is above a given level.

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Titel:

Effects of Annealing Treatment of Superconductivity in Powder Sintered YBCO

Beteiligte:

Tang, X. D. (Autor:in) / Wang, J. R. (Autor:in) / Xiong, S. G. (Autor:in) / Xu, J. R. (Autor:in) / Guo, G. R. (Autor:in) / Zhou, L. (Autor:in)

Erschienen in:

Advances in Cryogenic Engineering Materials ; 447-452

An International Cryogenic Materials Conference Publication ; 36

Erscheinungsdatum:

01.01.1990

Format / Umfang:

6 pages

ISBN:

978-1-4613-9882-0 , 978-1-4613-9880-6

ISSN:

DOI:

https://doi.org/10.1007/978-1-4613-9880-6_57

Medientyp:

Aufsatz/Kapitel (Buch)

Format:

Elektronische Ressource

Sprache:

Englisch

Schlagwörter:

Annealing Sample , Annealing Treatment , Powder Sinter , Parabolic Dependence , Onset Transition Temperature Chemistry , Biochemical Engineering , Characterization and Evaluation of Materials , Mechanical Engineering

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