Abstract
The doped NaNbO3 ceramics of (1−x)NaNbO3–xLa(Nb1/3Mg2/3)O3 were prepared by conventional solid state method, and then the dielectric, phase transition and energy storage performances were investigated. The X-ray diffraction results showed a phase transition from orthorhombic to rhombohedral occurred with the increase of x. The introduction of additives induced the first-order anti-ferroelectric phase transition and decrease of phase transition temperatures. As a result, an enhanced recoverable energy storage density of 1.45 J cm−3 was observed when x = 4.5% with an efficiency of 69.6% under a moderate electric field. The thermal hysteresis phenomenon was attractive not only in chemical modification but also in the enhancement of energy storage properties. This will contribute to the promotion of NaNbO3-based dielectric capacitors.
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