LAUSR

In this paper, the effect of BiNbO4 doping on the structural characteristics and dielectric properties were investigated systematically. With the increase in the BiNbO4 content, a systematic structural characteristics change from ferroelectric tetragonal to cubic phase. Dielectric properties changed from classical ferroelectric behavior to dispersive relaxor-like behavior, further to linear behavior. Because of the created defect dipoles, the long-range dipolar interaction was interrupted and the weak couplings were formed. Energy storage density reached the maximum of 0.797 J/cm3 with energy efficiency of 92.5% in 0.9BT-0.1BN. The nonlinearity was suppressed obviously, which could enhance the energy storage density in lead-free relaxor materials.