The study on various wet chemistry techniques on YBa2Cu3O7-delta superconducting oxides powder preparation

摘要

This paper reports on the results of four different wet chemical techniques used for the synthesis of superconducting oxides. YBa2Cu3O7 (YBCO). YBCO samples were prepared by complexion citric gel route (CT), acetate-tartrate sol-gel (ASG), oxalate/ethanol coprecipitation (COP), and acetate-tartrate sol-gel solid-state reaction (ASG-SSR) techniques. Each of the YBCO powders was annealed for 4 h at 880 degrees C, 900 degrees C, 920 degrees C, and 950 degrees C to find the optimum temperature. The optimum sintering temperature for the formation of Y-123 phase is very much dependent on the type of wet chemical technique used to prepare the powders. (C) 2008 Elsevier B.V. All rights reserved.