Characterization of copper ferrite spinel synthesized by glycinenitrate combustion process for using as solid oxide fuel cell interconnects coating

In this research, CuFe2O4 spinel powder was prepared by an optimized glycine-nitrate combustion process (GNP) followed by calcinations. The samples were characterized by X-ray diffraction (XRD), scanningelectron microscopy (SEM), dilatometry and 4-probe DC methods. Different glycine to nitrate (G/N) ratios of 1(fuel-deficient), 1.48 (stoichiometric) and 2 (fuel-rich) were employed. The as-prepared powders were calcinedat 800 and 1000 °C for 5 hours. It showed that the 2 ratio resulted in the formation of desired copper spinel single phase at both calcinations temperatures. The electrical conductivity and the coefficient of thermalexpansion of the sintered pelletized samples were obtained 2 S.cm-1 (800°C) and 11×10-6 °C-1 (25-800°C), respectively.

Keywords:

SOFC interconnect coatings , Copper ferrite , Spinels , Electrical conductivity , Glycine–nitrate process