Effect of Nd-concentration in Nd(2-x)FexO3 system on the structure and microwave absorption characteristics 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, SEM to observe the morphology 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 (ABO3). While multiphase have been formed which is indicated by the appearance of NdFeO3 and Nd2O3 phase for x = 0.5, and then NdFeO3 and Fe2O3 phase for x = 1.2. SEM image shows the samples of Nd(2-x)FexO3 have homogenous morphology with particle size is approximately 200 nm. The results of microwave absorbing properties measured by using VNA (Vector Network Analyzer) shows the best ability of microwave absorption is x = 1.0 composition is around 96.27% at frequency of 10.46 GHz.

Graphical Abstract

Effect of Nd-concentration in Nd(2-x)FexO3 System on the Crystal Structure and Microwave Absorption Characteristics