Akademik Veri Yönetim Sistemi
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, cilt.471, ss.1692-1698, 2011 (SCI-Expanded)
NdCeCuO superconducting samples were fabricated using ethyl alcohol, acetone and ethylenediaminetetraacetic acid (EDTA) as binding agents. For evaporation of binding agents, the samples were heat treated at 1050 degrees C for 24 h and then at 950 degrees C for 6-48 h under argon atmosphere to obtain the superconducting phase. The best superconducting performance was found in the sample heat treated at 1050 degrees C for 24 h and then 950 degrees C for 12 h which was fabricated by using acetone as binding agent. The T(c) and T(0) value was found to be similar to 25 K and 23.4 K, respectively. Grain size in the samples fabricated was calculated using Scherer equation and SEM data. It was found that grain size strongly depends on the binding agents and heat treatment conditions. Some cracks and voids on the surface of the samples were observed, which influences the superconducting and electrical transport properties of the samples. (C) 2011 Elsevier B.V. All rights reserved.