Study on the relationship between the defect and dielectric properties of ZnO-doped BiNbO4 ceramic

BiNbO4 ceramic is one kind of potential low-firing microwave dielectric material for microwave applications. ZnO was doped into BiNbO4 ceramics, the dielectric properties of the ceramic as a function of compositional variation, sintering temperature, and sintering atmosphere were studied. By means of the LCR Meter, Network Analyzer and Thermal Environmental Test Chamber, the dielectric properties at various frequencies were tested. Simultaneously, the temperature depended dielectric properties was studied. Then, according to the dielectric behavior under different sintering atmosphere, the relationship between defect and dielectric performance of BiNbO4 ceramic was discussed.