Effect of Nd Concentration on the Structure and Microwave Absorption of Nd(2-x)FexO3 System

Effect of Nd-concentration on the structure and microwave absorption of Nd(2-x)FexO3 system have been studied. Nd(2-x)FexO3 system is one of perovskite based system which has a relative high permittivity. Nd(2-x)FexO3 (x = 0.5; 1.0 and 1.2) samples were synthesized by Fe(NO3)3 and Nd(NO3)3 in mole ratio using sol – gel method and then sintered at 800 C for 5 hours. All of the samples were characterized using XRD to identify the phase and VNA was used to measure the microwave absorption. Phase identification of XRD data shows that single phase of NdFeO3 have been formed for x=1.0 composition. While multiphase have been formed which is indicated by the appearance of NdFeO3 and Fe2O3 phase for x=0.5, and then NdFeO3 and Nd2O3 phase for x=1.2. The samples of Nd(2-x)FexO3 have homogenous morphology with particle size is about 200 nm. The results of microwave absorbing properties measured by using VNA (Vector Network Analyzer) shows the ability of microwaves absorption increased with increasing Nd concentration, with maximum absorption by x = 1.0 composition is around 96.27 % at frequency of 10.46 GHz.