Effect of V₂O₅ Addition on Properties of ZnNb₂O₆ Dielectric Ceramics

ZnNb2O6 dielectric ceramics doped with V2O5 were prepared by conventional mixed solid method.Their microstructure was analyzed by XRD,SEM and their dielectric properties were also determined by LCR testing analyzer.The effect of V2O5 on the sinterability and dielectric properties of ZnNb2O6 ceramics was studied.ZnNb2O6 ceramics with low sintering temperature,high dielectric constant and suitable temperature coefficient of resonant frequency were obtained due to the addition of V2O5.However,slightly higher dielectric loss values appeared in the V2O5-doped ZnNb2O6 ceramics.The 1.0% V2O5-doped ZnNb2O6 ceramics sintered at 1 050 ℃ had the optimum dielectric properties,εr=28,tanδ=0.000 6 and τf=-42.50×10-6 ℃-1.