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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of Ta2O5 addition on the texture of the Y123 superconductor

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Author(s):
Oliveira, C. J. V. ; Bortolozo, A. D. ; Ferreira, B. ; Santos, C. A. M. dos ; Machado, A. J. S. [5]
Total Authors: 5
Document type: Journal article
Source: PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS; v. 422, n. 3/4, p. 83-87, June 2005.
Field of knowledge: Engineering - Materials and Metallurgical Engineering
Abstract

In this work we present a systematic study of the Ta influence on the texture of Y123 superconducting phase. The differential thermal analysis (DTA) results show a systematic decreasing of the peritectic temperature, from 1020 ºC for Y123 without Ta doping to approximately 950 ºC for Y 0.92Ta0.08Ba2Cu3Oy composition. The excellent texture reached by samples is confirmed through X-ray diffraction (TETA/2TETA) which reveals only (0 0 l) reflections, consistent with the rocking curve measurement in which FWHM 0.2º. The microstructures observed by scanning electron microscopy (SEM) indicate segregation of an additional phase. The energy dispersive spectrometry (EDS) revealed that this phase has the Y0.5Ta0.5BaO3 stoichiometry. (AU)