Structure characteristics and microwave dielectric properties of ZnZrNb2O8 oxide ceramics

This study investigates the synthesis, structural analysis, and microwave dielectric characteristics of ZnZrNb 2 O 8 ceramics, prepared via solid-state reaction method and subjected to sintering at temperatures ranging from 1,000°C to 1,200°C for 4 h. X-ray diffraction (XRD) analysis confirms the successful formation of ZnZrNb 2 O 8 phase, with a monoclinic wolframite phase. Scanning electron microscopy (SEM) investigations unveil microstructural features such as grain size and porosity, reveals material’s morphological details. Dielectric properties conducted in the microwave frequency regime show a correlation between dielectric constant ( ε r ) and relative density of the ceramics. Importantly, the ceramics exhibited a suitable dielectric constant and low dielectric loss, indicative of their suitability for microwave applications. Remarkably, ZnZrNb 2 O 8 ceramics sintered at 1,150°C for 4 h exhibit excellent microwave dielectric properties ( ε r = 27.2, Q × f = 54,500 GHz, and τ f = −60 ppm/°C). These findings underscore the potential of ZnZrNb 2 O 8 ceramics as advanced materials for high-frequency applications, including filters, resonators, and other microwave devices, thus contributing significantly to the advancement of next-generation telecommunications technologies.