Microstructure of YBCO bulk superconductors with CeO2 addition

Diko, P.; Šefčiková, M.; Kaňuchová, Mária; Zmorayová, K.

doi:10.1016/j.mseb.2008.03.004

Cited by 19 publications

(14 citation statements)

References 2 publications

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“…Cerium can be added in two forms and these are CeO 2 and BaCeO 3 . In both cases the powder addition is dissolved in the peritectic melt and inhibits the Y211 particles growth by the Ostwald ripening process [7]. Disadvantage of using CeO 2 is appearance of CuO in the final product due to reaction 2Y123 + 3CeO 2 ⇒ 3BaCeO 3 + Y211 + 5CuO.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Nanocrystalline BaCeO₃ by Oxalate Coprecipitation for YBa₂Cu₃O₇ Bulk Superconductors

et al. 2018

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Barium cerate (BaCeO3) is one of the preferred additions to bulk YBa2Cu3O7 single-grain superconductors to inhibit the growth of Y2BaCuO5 particles. The present paper investigates synthesis of very fine barium cerate powder and its use in YBa2Cu3O7 bulk superconductor growth. The crystalline barium cerate was synthesized by oxalate co-precipitation from barium and cerium nitrates. X-ray diffraction in air and vacuum was performed to understand the formation of barium cerate as well as to determinate its crystal structure. Size and shape of BaCeO3 particles were studied by scanning electron microscopy. The BaCeO3 was used to grow YBa2Cu3O7 bulk superconductor. Microstructure of prepared YBa2Cu3O7 crystal shows that the barium cerate in the final product is very fine and uniformly distributed throughout the whole YBa2Cu3O7 crystal.

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Section: Introductionmentioning

confidence: 99%

“…(1) It results in a critical concentration of copper oxide, which stops the growth of Y123 crystal [7][8][9]. It has been also shown that addition of BaCeO 3 refines Y211 particles more effectively than CeO 2 [10], but BaCeO 3 prepared by solid state reaction often leads to appearance of agglomerates of BaCeO 3 in the grown YBCO BSS.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nanocrystalline BaCeO₃ by Oxalate Coprecipitation for YBa₂Cu₃O₇ Bulk Superconductors

et al. 2018

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“…The microstructure analysis of all doped samples demonstrated that the Li or Al additions do not form any compound with Y, Ba, Cu or Ce in the system; therefore, we assume that the dopants are diluted in the system. The Y211 particles typically have a bimodal distribution, observed in the samples prepared with Y 2 O 3 additions combined with friction milling [6], and the Y211 particle size is not significantly refined by CeO 2 additions, being 1.4 μm for undoped samples. This quite large 211 particle size explains why the basic level of the critical current density at 77 K is not very high.…”

Section: Resultsmentioning

confidence: 99%

Influence of thermochemical treatments on TSMG YBCO bulks doped with Li and Al

Diko

Antal

Kaňuchové

et al. 2010

J. Phys.: Conf. Ser.

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The influence of post-growth thermochemical treatments on the transition temperature and the field dependence of the critical current density at 77 K were studied in Y 1.5 Ba 2 (Cu , M) 3 O y , for M = Li, and Al, bulk superconductors with CeO 2 additions prepared by the Top-Seeded Melt-Growth (TSMG) process. The Li and Al dopants react in an opposite way during pre-annealing in an atmosphere with low and high oxygen partial pressure and this behaviour can be associated with the formation and dissolution of dopant clusters. High pressure high temperature oxygenation preserves the peak effect introduced by the dopants and leads to the elimination of oxygenation cracks and consequently to significant increases in the effective critical current density.

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“…Only Ce dissolved in the melt can effectively slow down the growth of Y211 particles. 27 During the crystallization of the Y123 bulk, BaCeO3 crystallizes from the melt because Ce is not soluble in the Y123 crystal. The effectiveness of the prepared powders is clearly visible after examining the microstructure of the prepared Y123 bulks.…”

Section: Effectiveness Of Baceo 3 Powders Prepared By Different Promentioning

confidence: 99%

Influence of addition of nanosize barium cerate on the microstructure and properties of top‐seeded melt growth YBCO bulk superconductors

et al. 2020

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Microstructure of YBCO bulk superconductors with CeO2 addition

Cited by 19 publications

References 2 publications

Synthesis of Nanocrystalline BaCeO₃ by Oxalate Coprecipitation for YBa₂Cu₃O₇ Bulk Superconductors

Synthesis of Nanocrystalline BaCeO₃ by Oxalate Coprecipitation for YBa₂Cu₃O₇ Bulk Superconductors

Influence of thermochemical treatments on TSMG YBCO bulks doped with Li and Al

Influence of addition of nanosize barium cerate on the microstructure and properties of top‐seeded melt growth YBCO bulk superconductors

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Microstructure of YBCO bulk superconductors with CeO2 addition

Cited by 19 publications

References 2 publications

Synthesis of Nanocrystalline BaCeO3 by Oxalate Coprecipitation for YBa2Cu3O7 Bulk Superconductors

Synthesis of Nanocrystalline BaCeO3 by Oxalate Coprecipitation for YBa2Cu3O7 Bulk Superconductors

Influence of thermochemical treatments on TSMG YBCO bulks doped with Li and Al

Influence of addition of nanosize barium cerate on the microstructure and properties of top‐seeded melt growth YBCO bulk superconductors

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Synthesis of Nanocrystalline BaCeO₃ by Oxalate Coprecipitation for YBa₂Cu₃O₇ Bulk Superconductors

Synthesis of Nanocrystalline BaCeO₃ by Oxalate Coprecipitation for YBa₂Cu₃O₇ Bulk Superconductors