Enhancing the energy-storage performance of lead-free dielectric ceramics is essential for developing environmentally sustainable capacitors and power devices. NaNbO$_3$, a promising perovskite, exhibits considerable potential for dielectric applications but is limited by poor densification and high dielectric loss. In this work, the effects of tantalum (Ta) doping at varying concentrations $\text{NaNb}_{1-x}\text{Ta}_x\text{O}_3$, with $x = 0.05, 0.10, \text{and } 0.15$, corresponding to 5%, 10%, and 15% Ta substitution on the crystal structure, microstructure, and electrical properties of NaNbO$_3$ ceramics were systematically investigated. X-ray diffraction (XRD) confirmed phase purity an... More >