AUTHOR=Kumar Ashwini , Sharma Poorva , Qiu Fujun 

TITLE=Structure characteristics and microwave dielectric properties of ZnZrNb2O8 oxide ceramics

JOURNAL=Frontiers in Materials

VOLUME=11

YEAR=2024

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2024.1367754

DOI=10.3389/fmats.2024.1367754

ISSN=2296-8016

ABSTRACT=<p>This study investigates the synthesis, structural analysis, and microwave dielectric characteristics of ZnZrNb<sub>2</sub>O<sub>8</sub> 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<sub>2</sub>O<sub>8</sub> 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 (<italic>ε</italic><sub><italic>r</italic></sub>) 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<sub>2</sub>O<sub>8</sub> ceramics sintered at 1,150°C for 4 h exhibit excellent microwave dielectric properties (<italic>ε</italic><sub><italic>r</italic></sub> = 27.2, <italic>Q</italic> × <italic>f</italic> = 54,500 GHz, and τ<sub>f</sub> = −60 ppm/°C). These findings underscore the potential of ZnZrNb<sub>2</sub>O<sub>8</sub> 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.</p>