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<p>YBa₂Cu₃O₇₋<sub>δ</sub> (YBCO) high-temperature superconductors exhibit enhanced flux pinning capabilities along with high critical temperature (<i>T</i><sub>c</sub>). An improvement in flux pinning and, consequently, the critical current density (<i>J</i><sub>c</sub>) can be achieved by tailoring the precursor phases and their microstructures. In this study, we compare the microstructural modifications of Y₂BaCuO₅ (Y-211) secondary phase particles via ultrasonication processing in de-ionized water (DIW) and ethanol on the superconducting properties of bulk YBCO superconductors.Y-211 precursor powders are engineered by subjecting to high-energy ultrasonication at 450&#xa0;W for 30&#xa0;min in de-ionized water and Ethanol. This ultrasonication treatment leads to the formation of nanoscale, surface-modified Y-211 particles, characterized by high surface reactivity and defect density. These pre-treated Y-211 powders are utilized to grow YBCO single grains employing top-seeded infiltration growth (IG) process. Electron microscopy analysis on YBCO bulks revealed a homogeneous microstructure with well-dispersed Y-211 inclusions and embedded sub-phases within the YBCO matrix. Superconducting transition measurements show sharp onset at the temperature of ~ 92&#xa0;K. The self-field <i>J</i><sub>c</sub> at 77&#xa0;K enhances to <b>90</b> kA/cm² using ultrasonically DIW treated Y-211 powders compared to Ethanol treated (72 kA/cm²) YBCO superconductors. These findings validate the effectiveness of ultrasonically engineered <i>RE</i><i>₂BaCuO₅</i> precursors in tailoring flux pinning characteristics and enhancing the performance of <i>RE</i>Ba₂Cu₃O₇₋<sub>δ</sub> bulk superconductors.</p>

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High-Energy Ultrasonication of Y2BaCuO5 in Aqueous Medium: A Cleaner Approach to Enhanced YBa2Cu3O7-δ Bulk Superconducting Properties

  • 期刊论文

  • 发表日期：

    2026年5月12日

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  • Vallabhapurapu Sreenivasu,
  • Lemma Kurie Baruda,
  • Rikako Hagiwara,
  • Ramesh Ade,
  • P. M. Swarup Raju,
  • Taichiro Nishio,
  • Pavan Kumar Naik Sugali

摘要

YBa₂Cu₃O₇₋δ (YBCO) high-temperature superconductors exhibit enhanced flux pinning capabilities along with high critical temperature (Tc). An improvement in flux pinning and, consequently, the critical current density (Jc) can be achieved by tailoring the precursor phases and their microstructures. In this study, we compare the microstructural modifications of Y₂BaCuO₅ (Y-211) secondary phase particles via ultrasonication processing in de-ionized water (DIW) and ethanol on the superconducting properties of bulk YBCO superconductors.Y-211 precursor powders are engineered by subjecting to high-energy ultrasonication at 450 W for 30 min in de-ionized water and Ethanol. This ultrasonication treatment leads to the formation of nanoscale, surface-modified Y-211 particles, characterized by high surface reactivity and defect density. These pre-treated Y-211 powders are utilized to grow YBCO single grains employing top-seeded infiltration growth (IG) process. Electron microscopy analysis on YBCO bulks revealed a homogeneous microstructure with well-dispersed Y-211 inclusions and embedded sub-phases within the YBCO matrix. Superconducting transition measurements show sharp onset at the temperature of ~ 92 K. The self-field Jc at 77 K enhances to 90 kA/cm² using ultrasonically DIW treated Y-211 powders compared to Ethanol treated (72 kA/cm²) YBCO superconductors. These findings validate the effectiveness of ultrasonically engineered RE₂BaCuO₅ precursors in tailoring flux pinning characteristics and enhancing the performance of REBa₂Cu₃O₇₋δ bulk superconductors.