A new rare-earth orthovanadate microwave dielectric ceramic: ErVO4

A new microwave dielectric ceramic ErVO4 with a zircon structure was prepared by solid-state reaction method. The structure of ErVO4 was confirmed by X-ray diffraction and TEM diffraction, and no second phase was generated in the ceramic. At different sintering temperatures, slight changes in the lattice parameters affected microwave dielectric properties of the ErVO4 ceramic. Relative density, packing fractions, etc. Were investigated to analyze the variation of dielectric properties. Further the complex chemical bond theory revealed that the dielectric constant had a similar changing trend to the ionicity of bond, while the lattice energy had a positive impact on the quality factor. ErVO4 ceramic sintered at 1150 °C had the microwave dielectric properties of εr = 12.03, Q × f = 25,549 GHz, and τf = −52.89 ppm/°C. •A new rare-earth orthovanadate microwave dielectric ceramic ErVO4 was synthesized.•The effect of bond ionicity and lattice energy on dielectric constant and quality factor was studied using the complex chemical bonding theory.•ErVO4 ceramic sintered at 1150 °C had the performances of εr = 12.03, Q × f = 25,549 GHz and τf = −52.89 ppm/°C.