Study of the Effect of Oxygen Annealing on YBCO Platelet Aggregates Synthesized by a Biomimetic Method

Abstract:

The effect of different oxygen annealing treatments on the structural and electrical properties of samples of the high temperature superconductor YBa₂Cu₃O_7δ (YBCO) synthesized by a biomimetic method has been studied. By oxygen annealing, the oxygen deficiency resulting from the synthesis in air can be adequately compensated. A two-stage annealing process including a high temperature step results in a sharper superconducting transition and higher critical current density of the YBCO than annealing only at low temperature, due to the additional elimination of carbon residues from the biopolymer additive. To avoid the formation of impurity phases resulting from decomposition of the YBCO during the high-temperature anneal, careful pre-treatment by rinsing the as-synthesized YBCO with distilled water to remove residual NaCl is necessary.

• Periodical: Advanced Materials Research (Volumes 834-836)
• Pages: 437-441
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.834-836.437
• Online since: October 2013
• Authors: Zi Li Zhang, Hongli Suo, Ahmed Kursumovic, Min Liu, Yi Wang, Judith L. MacManus-Driscoll, Stuart C. Wimbush*
• Keywords: Biosynthesis, Oxygen Annealing, Superconducting Properties, YBCO

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DOI: 10.1039/c2ce25223f

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