Preparation and characterization of (Ca, La)Ti(O, N)3 perovskite oxynitride

Abstract

In order to prepare (Ca,La)Ti(0,N)₃ oxynitrides with perovskite structure, the (Ca,La)TiO_3+⋅ powders were nitrided in NH₃ atomsphere. The obtained oxinitrides were characterized by TG-DTA, XRD and Neutron powder diffraction. It was found by TGA that the oxygen defect of (Ca,La)Ti(0,N)₃ disappeared by heat-treatment at 500°C for 1h in air. Crystal structure of the (Ca,La)Ti(0,N)₃ was determined to be orthorhombic space group Pbnm by the Rietveld analysis of neutron diffraction data (Rwp=4.72%, S=1.37).