Resumo

SOTO-GOMEZ, Erika Yazmin; SARMIENTO-SANTOS, Armando  e  PARRA-VARGAS, Carlos Arturo. Synthesis of the YBa ₂ Cu ₃ O _7-δ superconductor through abnormal glow discharge sintering. Rev. acad. colomb. cienc. exact. fis. nat. [online]. 2017, vol.41, n.158, pp.36-40. ISSN 0370-3908.  https://doi.org/10.18257/raccefyn.428.

In this study we synthesized the YBa2Cu3O7-δ superconductor using the unconventional method of plasma sintering in the range of abnormal glow discharge (AGD). The samples were treated with different sintering temperatures and times. As reference we used a superconductor sample obtained by using the conventional method (resistive furnace). The structural characterization of these samples was performed by X-ray diffraction measurements and Rietveld refinements. Superconductivity behavior was determined by analyzing magnetization curves as a function of the temperature according to zero field cooling (ZFC) and field cooling (FC) experimental procedures. The samples sintered by AGD presented structural characteristics (orthorhombic Pmmm) and superconductivity with a critical temperature of Tc ~ 92 K, which were similar to those obtained by the conventional method, but with a significant reduction of temperature and time under proper pressure environment during the sintering process. © 2017. Acad. Colomb. Cienc. Ex. Fis. Nat.

Palavras-chave : Sintering; Resistive furnace; Abnormal glow discharge; Superconductivity..

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