采用柠檬酸盐法合成了具有单一钙钛矿结构的(Nao5Bio5)1-xBaxTiO3(x=0,x=0.04)超细粉料,并研究了陶瓷样品的极化特性、压电性能和铁电性能.研究结果表明,柠檬酸与金属离子的摩尔比(C/M)控制在1.2～1.6、前驱体液的pH值控制在7～9范围内可以得到均匀透明的溶胶和凝胶,凝胶在600℃下热处理1h后可形成单一钙钛矿结构的超细粉料.XRD研究结果表明,x=0和x=0.04时陶瓷样品均为三方钙钛矿结构.极化电压和极化温度对陶瓷样品的压电性能有很大影响,而极化时间对压电性能的影响则不显著.Ba2+的固溶改善了陶瓷样品的铁电性能,有利于材料极化性能和压电性能的提高.与常规固相法制备的同种组成样品相比,柠檬酸盐法制备的(Nao5Bi0.5)1-xBaxTiO3(x=0,x=0.04)陶瓷具有较好的压电性能.
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