Effect of BiMO3 (M=Al, In, Y, Sm, Nd, and La) doping on the dielectric properties of BaTiO3 ceramics. Issue 13 (September 2017) - Wei, Meng
Abstract: In this study, in order to enhance the energy storage density, 10% BiMO3 doping is performed in BaTiO3 ceramics (M=Al, In, Y, Sm, Nd, La) by a traditional solid-state method. The effects of different M 3+ radii on the structural characteristics, dielectric properties, and energy storage are investigated systematically. The locations of the M-ions gradually shift from B-site substitutions to A-site substitutions with the increase in the ionic radius, which affect the structural characteristics and the dielectric properties. When 80M3+ <95.5 pm, the ceramic has a cubic phase which shows the highest energy density; while out of this range, the dielectric properties of the ceramics are degraded. Specially, the change rate of permittivity of the Sm substituted composition reaches 70% at 100 kV/cm, which might be good for high frequency tunable device application. Typically, combined with the suppression of nonlinearity, polarization maximum (Pm ) and remnant polarization (Pr ), 0.9BaTiO3 –0.1BiInO3 exhibits the maximum energy density of 0.753 J/cm 3 and the highest energy efficiency of 89.4%, which exhibits slim P-E hysteresis loops for energy storage applications.