The Effects of Calcination Temperatures on Crystal Structures and Morphologies of Nd_(1.2)FeO3 Synthesized by Solid-State Reaction

摘要

NdFeO3 is one of the oxide alloys that can be used as a raw material for gas sensor.The NdFeO3 have been synthesized using solid state reaction method by varying calcination temperatures of 750°C,850°C,and 950°C for 6 h.All of the Nd_(1.2)FeO3 samples were characterized using scanning electron microscope(SEM)and x-ray diffraction(XRD)to identify their morphologies and phases.The results show that all of the samples formed major phase is NdFeO3 and minor phase of Nd2O3 and have homogenous morphology with estimating grain size is 0,2 μm for all samples.The value of FWHM and the crystal size of Nd_(1.2)FeO3 was obtained for each sample is 0.22° and 372 nm.The orthorhombic phase with a dominant peak at hkl(121)is an indication that material has potential application as a gas sensor.