BaTiO_(3-x)Bi(Mg_(2/3)Sb_(1/3))O_(3)陶瓷的储能特性研究

Research on Energy Storage Characteristics of BaTiO_(3-x)Bi(Mg_(2/3)Sb_(1/3))O_(3)Ceramics

采用固相法制备了(1-x)BaTiO_(3-x)Bi(Mg_(2/3)Sb_(1/3))O_(3)(x=0,0.08,0.12,0.16)(BT-x BMS)陶瓷。系统研究了不同含量的BMS对BT基陶瓷的微观形貌、结构、介电和铁电性能的影响。结果表明:BT-x BMS陶瓷为单一的钙钛矿结构。随着BMS含量的增加,BT-x BMS陶瓷呈现出细化的晶粒尺寸,同时从正常铁电体逐渐转变为弛豫型铁电体。此外,BT-x BMS陶瓷的剩余极化显著降低,有助于获得优异的储能性能。当x=0.12时,在460 kV·cm-1的电场下获得最优的可回收储能密度(W_(rec)=3.06 J·cm^(-3))和储能效率(η=94.02%)。结果表明BT-x BMS陶瓷在介电电容器领域具有巨大的应用前景。

(1-x)BaTiO_(3-x)Bi(Mg_(2/3)Sb_(1/3))O_(3)(x=0,0.08,0.12,0.16)(BT-x BMS)ceramics were prepared by solid phase method.The effects of BMS content on the microstructure,structure,dielectric and ferroelectric properties of BT-based ceramics were systematically investigated.The results indicate that BT-x BMS ceramics have a single perovskite structure.With the increase of BMS content,the BT-x BMS ceramics exhibit a refined grain size and transform from normal ferroelectrics to relaxor ferroelectrics.In addition,the residual polarization of BT-x BMS ceramics is significantly reduced,which contributes to obtaining excellent energy storage performance.When x=0.12,high recyclable energy storage density(W_(rec)=3.06 J·cm^(-3))and energy storage efficiency(η=94.02%)can be obtained at 460 kV·cm^(-1),which indicates that the BT-x BMS ceramics have great development potential in the field of dielectric capacitors.