B位Ta/Zr共掺对无铅BNKT-ST-Ta_xZr_y陶瓷的储能特性和电性能的影响  

Effect of Ta/Zr B-site co-doping on energy-storage and electrical properties of BNKT-ST-Ta_xZr_y based lead-free ceramics

作　　者：洪雅萍[1] 黎清宁[1] 曾卫东[1] 童凯[1] 周昌荣[1] HONG Yaping;LI Qingning;ZENG Weidong;TONG Kai;ZHOU Chongrong(School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, Guangxi Zhuang Autonomous Region, China)

机构地区：[1]桂林电子科技大学材料科学与工程学院,广西桂林541004

出　　处：《电子元件与材料》2017年第1期14-20,共7页Electronic Components And Materials

基　　金：国家自然科学基金资助(No.61561015);广西自然科学基金资助(No.2015GXNSFAA139250)

摘　　要：采用固相合成法制备了B位Ta/Zr共掺杂的0.96[Bi_(1/2)(Na_(0.84)K_(0.16))_(1/2)(Ti_(1–x–y)Ta_xZr_y)O_3]-0.04Sr TiO_3(简称BNKT-ST-Ta_xZr_y)(x=0~0.025,y=0~0.20)无铅陶瓷。研究了B位Ta/Zr共掺对BNKT-ST-Ta_xZr_y无铅三元陶瓷微观结构、电性能和储能密度的影响。结果表明:随着Ta和Zr含量的增加,陶瓷的压电常数d_(33)减小,陶瓷向先兆性压电体转变;饱和极化强度、剩余极化和矫顽场降低,陶瓷的弛豫特性增加;储能密度先增加后降低,并且储能密度在x=0.01,y=0.05时达到最大值(1.005 J/cm^3),储能效率持续增加。0.96[Bi1/2(Na0.84K0.16)1/2(Ti1–x–yTaxZry)O3]-0.04SrTiO3(labelled as BNKT-ST-TaxZry) (x=0-0.025, y=0-0.20) lead-free ceramics were synthesized by the conventional solid state reaction method. Effect of Ta/Zr B-site co-doping was studied on the microstructure, electrical properties and energy density of lead-free BNKT-ST-TaxZry ternary system ceramics. The results indicate that, with the increase of concentration of Ta and Zr ions, the piezoelectric constant d33 of ceramic decreases, and the ceramic shifts toward to incipient piezoelectrics. As the Ta and Zr doping level increases, the saturation polarization, remanent polarization and coercive field decrease, and the relaxation properties increase. With the increasing of Ta and Zr doping concentration, the energy storage density of the ceramic increases and reaches a maximum value of 1.005 J/cm3 (x=0.01, y=0.05), and then decreases with further increasing x and y. The energy storage efficiency (η)increases monotonically with concentration of x and y.

关 键 词：Ta/Zr共掺 0.96[Bi1/2(Na0.84K0.16)1/2(Ti1–x–yTaxZry)O3]-0.04SrTiO3 电性能 储能密度 储能效率 弛豫特性 

分 类 号：TM282[一般工业技术—材料科学与工程]