Investigation of dielectric properties and ferroelectric phase transition in lead-free AgNbO3

Dielectric materials based on AgNbO3 show application capabilities in a broad range of electronics applications. This study looked into the dielectric and ferroelectric phase transitions of AgNbO3. The dielectric and ferroelectric phase transition dominates the temperature and electric field-based performance of AgNbO3 ceramics, which has a significant impact on its properties. The results of this study suggest that, at room temperature, XRD characterization of sintered samples for phase investigation showed that AgNbO3 is orthorhombic (Pmc21), and ferroelectric properties occur in AgNbO3 at temperatures lower than 70 °C. The effect of Ag concentration on electric dipole interaction and polar phase stability is discussed. The temperature functions, loss tangent (tan δ) and dielectric permittivity (ε) all displayed performance consistent with a ferroelectric phase transition.