Synthesis, characterization, and microwave dielectric properties of monoclinal structure ZnZrNb2O8 ceramics through the aqueous sol–gel process

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The ixiolite-structure MnZrNb2O8 ceramics were synthesized by the aqueous sol–gel method in order to reduce the sintering temperature. X-ray diffraction, scanning electron microscopy and Energy Disperse Spectroscopy were used to characterize the crystal structure, microstructure and phase composition. Highly reactive nanosized MnZrNb2O8 powders were successfully obtained at 600 °C and then used for preparing the MnZrNb2O8 ceramics. Furthermore, the sintering characteristics and microwave dielectric properties of these ceramics were also investigated under different sintering temperatures ranging from 950 to 1150 °C. In 1100 °C, the MnZrNb2O8 ceramics exhibited the excellent microwave properties of ɛ r = 26.46, Q·f = 15,050 GHz and τ f = −46.54 ppm/ °C. The relatively low sintering temperature and excellent dielectric properties in the microwave range would make these ceramics promising for microwave dielectric applications.