Abstract
AbstractSr0.8Na0.4Nb2O6with a tungsten bronze structure is introduced into perovskite‐structured 0.94(Bi0.5Na0.5)TiO3‐0.06BaTiO3composition (abbreviated as BNT‐BT‐xSNN, x = 0‐0.04). The temperature stability of dielectric properties and energy storage performance is found to be effectively enhanced by Sr0.8Na0.4Nb2O6dopant. When x is 0.03, the temperature ranges covering |ε'‐ε'150°C|/ε'150°C≤15% andtanδ≤ 0.02 are 43°C‐404°C and 90°C‐422°C, respectively. More importantly,ε′can be retained as high as 3304 at 150°C. Besides, the variances of energy storage density and its efficiency are 6.4% and 5.3%, respectively, in the temperature range from room temperature (RT) to 180°C. Therefore, this work provides a new method of compositional modification in BNT‐based materials to improve their temperature stability of dielectric and energy storage properties.
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