A novel low-temperature fired microwave dielectric ceramic BaMg2V2O8 with ultra-low loss

A new ultra-low-loss microwave dielectric ceramic BaMg2V2O8 with a tetragonal structure was successfully fabricated via a conventional solid-state method. X-ray diffraction and field-emission scanning electron microscopy were performed to explore the phase crystal, grain morphology and densification behavior. The results indicated that pure and dense BaMg2V2O8 ceramics with dielectric constant ϵr = 12, quality factor Q × f = 156140 GHz (9.9 GHz) and the temperature coefficient of resonant frequency τf = −36 ppm/°C could be yielded at a relatively low sintering temperature of 900 °C. Moreover, the 0.87BaMg2V2O8–0.13TiO2 ceramic sintered at 900 °C for 4 h demonstrated a near-zero τf of −4 ppm/°C, an ϵr of 13 and a Q × f of 97,334 GHz (9.6 GHz), showing large application potentials.