YBa2Cu3O7-δwas synthesised using a solution method. The coprecipitation of the stoichiometric amounts of nitrate solution of yttrium, barium and copper was performed using a mixture of NaOH, Na2CO3and H2C2O4in a molar ratio 5:1:1 as precipitation agent. The as-obtained precursors have a copper deficiency of 0.1 with respect to the nominal stoichiometry of the starting solution. The mechanistic study of the product formation has revealed that in these atomically mixed precursors the individual components have a different behaviour with respect to those in a mechanical mixture. The final products was obtained after heat treatment at 950°C for 6 h in oxygen atmosphere. The product was analyzed by XRD, SEM, EDXS and four probe DC resistivity measurements. The as-synthesised YBCO has shown good superconducting properties Tc(R = 0) = 90.5 K and ΔT = 1 K. This method was used with success in the fabrication of YBCO target for laser ablation.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering