Characterization of BaMg1/3(Ta1−xNbx)2/3O3 ceramics obtained by a modified Pechini method

Synthesis of oxide powders by soft chemistry methods has certain advantages over the solid-state reaction route in terms of homogeneity and morphology, leading to a better sinterability of the ceramics. BaMg1/3Ta2/3O3 powders were synthesized by various wet-chemical methods in order to improve the dielectric properties. Our paper reports, for the first time, the synthesis of BaMg1/3(Ta1−xNbx)2/3O3 (x = 0, 0.1, 0.2) ceramics via a modified Pechini method and their dielectric properties. Compositional, structural and morphological characterization of the powders was performed by TG-DTA, FTIR, XRD, SEM and TEM. BaMg1/3Ta2/3O3 powders show 13 nm particles average size and cubic structure. The dielectric properties of BaMg1/3Ta2/3O3-based ceramic bodies present a quality factor Q × f of 10–75 THz in the microwave range.