Na_(0.5)Bi_(0.5)TiO_(3)基无铅陶瓷的制备及电致伸缩效应研究  

Preparation and Electrostrictive Effect of Na_(0.5)Bi_(0.5)TiO_(3)-based Lead-free Ceramics

作　　者：曹文萍 高岩 王状 陈尚[2] 谷吉海[1] CAO Wen-ping;GAO Yan;WANG Zhuang;CHEN Shang;GU Ji-hai(School of Light Industry,Harbin University of Commerce,Harbin 150028,China;China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]哈尔滨商业大学轻工学院,哈尔滨150028 [2]中国运载火箭技术研究院,北京100076

出　　处：《包装工程》2022年第13期1-8,共8页Packaging Engineering

基　　金：国家自然科学基金(51802061);黑龙江省普通本科高等学校青年创新人才培养计划(UNPYSCT−2020215);哈尔滨商业大学科研项目(2020CX05)。

摘　　要：目的在Na_(0.5)Bi_(0.5)TiO_(3)基陶瓷材料中诱导缺陷来提高其电致伸缩性能,在室温下获得性能优异的电致伸缩材料,该材料可用于包装机械物料供给微振动器的研发。方法利用传统固相合成法制备0.7(Bi_(0.5)Na_(0.5))Ti_(0.9)Mn_(0.1)O_(3)−0.3Sr_((1−3x/2))Bi_(x□x/2)TiO_(3)(NBT−SBxT−Mn)陶瓷。通过掺杂Sr_((1−3x/2))Bi_(x□x/2)TiO_(3),在陶瓷中形成V_(A)−V_(O)局部缺陷,获得具有极性纳米微区的非极性相结构。同时,通过掺杂MnO在陶瓷中形成M_(n)−V_(O)缺陷偶极子,获得滞后小的电致伸缩应变。结果所制备的样品均表现出极性纳米微区的非极性相结构和弥散度高于1.80的典型弛豫特征。随着x的增加,氧空位的含量先降低后明显增大。氧空位含量的降低表明在NBT−SBxT−Mn陶瓷中形成了M_(n)−V_(O)缺陷偶极子。在V_(A)−V_(O)局部缺陷、M_(n)−V_(O)缺陷偶极子、较高弛豫性及形成的极性纳米微区的共同作用下,组分x=0.07样品的电致伸缩系数高达0.036 m^(4)/C^(2),性能优异。结论通过在NBT基陶瓷材料中诱导缺陷能够有效改善其电致伸缩性能。The paper aims to propose a novel design strategy to enhance the electrostrictive property of Na_(0.5)Bi_(0.5)TiO_(3)-based materials by inducing defects,which can be used in ink-jet printing of packaging materials.0.7(Bi_(0.5)Na_(0.5))Ti_(0.9)Mn_(0.1)O_(3)-0.3Sr_((1-3x/2))Bi_(x□x/2)TiO_(3)(NBT-SBxT-Mn)ceramics were prepared using a conventional solid-state reaction method.The local defects could be created by V_(A) and V_(O) in the ceramics though modifying with Sr_((1-3x/2))Bi_(x□x/2)TiO_(3),leaving a"non-polar"phase with PNRs at zero electric field.Meanwhile,defect dipoles originated from Mn and V_(O) were induced into the ceramics by doping MnO,resulting in high electrostrictive strain with ultra-low hysteresis.All the samples exhibited both nonpolar phase structure with PNRs and typical features of relaxor characteristics withγ>1.80.With the increasing doping content x,the oxygen vacancy concentration decreased firstly and then had an obvious increase.The decrease of V_(O) concentration reflects the increase of defect dipole formation in NBT-SBxT-Mn ceramics.Accordingly,high electrostrictive coefficients Q_(33)=0.036 m^(4)/C^(2)were achieved for the composition of x=0.07 due to the combined contribution of V_(A)-V_(O) local defects,Mn-V_(O) defect dipoles,the relaxor characteristics and the formed PNRs.These results provide some instructive thought to further enhance the electro-strictive property of NBT-based materials by inducing defects.

关 键 词：钛酸铋钠基陶瓷 缺陷 电致伸缩效应 

分 类 号：TB34[一般工业技术—材料科学与工程] TQ174.1[化学工程—陶瓷工业]