INVESTIGATION INTO THERMAL EXPANSION AND SINTERING OF LA_2MO_(4+D) (LN = LA, PR AND M = NI, CO)

摘要

Oxides of the K_2NiF_4 structure type have been studied to investigate their compatibility as possible cathodes for solid oxide fuel cells. Compositions of Ln_2Ni_(1-x)Co_xO_(4+d) have been characterized using X-ray powder diffraction and dilatometry measurements giving information on the thermal expansion and sintering of these materials. From the in-situ diffraction studies significant structural modifications were noted and the onset of sintering for each material identified through the dilatometry measurements.