Compositions and Particle Sizes of (RE)Ba2Cu3O7-X Superconductor Powders Synthesized by the Solution Combustion Technique

Oratai Jongprateep; Pimsiri Tangbuppa; Nattawan Manasnilobon

doi:10.4028/www.scientific.net/AMR.488-489.286

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 488-489Compositions and Particle Sizes of (RE)Ba2Cu3O7-X...

Compositions and Particle Sizes of (RE)Ba₂Cu₃O_7-XSuperconductor Powders Synthesized by the Solution Combustion Technique

Abstract:

Superconducting compounds (RE) Ba₂Cu₃O_7-x (RE = rare earth such as Y, Er, Sm and Nd) can be exploited in various industrial applications such as cables, electric motors and energy storage systems. The project aimed at synthesizing fine-particle YBa₂Cu₃O_7-x, ErBa₂Cu₃O_7-x, SmBa₂Cu₃O_7-x and NdBa₂Cu₃O_7-x, powders with compositions suitable for the applications. Solution combustion technique was employed in the synthesis, using urea as fuel. Compositional analysis obtained from x-ray diffraction indicated that the as-synthesized powders contained the desired (RE)Ba₂Cu₃O_7-x (RE123) superconducting phase and impurities, including (RE)₂BaCuO₅(RE211), BaCO₃ and Ba(NO₃)₂. However, majority of the impurities were eliminated when the powders were calcined at 900°C. Only (RE)Ba₂Cu₃O_7-x (RE123) and (RE)₂BaCuO₅(RE211) phases remained after calcination. Results from scanning electron microscope showed that the as-synthesized powders obtained from the solution combustion technique had relatively small particles with average particle size of 0.67 micrometers, while the calcined powders exhibited coarsening effects with average particle size of 4.4 micrometers.

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Advanced Materials Research (Volumes 488-489)

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286-290

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https://doi.org/10.4028/www.scientific.net/AMR.488-489.286

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March 2012

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Oratai Jongprateep, Pimsiri Tangbuppa, Nattawan Manasnilobon

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Combustion Synthesis, Superconductors, Urea

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