Na^(+)和Bi^(3+)非化学计量比对Na_(0.5+x)Bi_(0.5-x)Ti_(0.99)Mg_(0.01)O_(3-δ)结构和电学性能的影响  

Effect of Non-stoichiometric Ratio of Na+and Bi 3+on Structureand Electrical Properties of Na_(0.5+x)Bi_(0.5-x)Ti_(0.99)Mg_(0.01)O_(3-δ)

作　　者：李润 孔明慧 郭翠婷 朱沛 杨强[1] 王德军[1] LI Run;KONG Minghui;GUO Cuiting;ZHU Pei;YANG Qiang;WANG Dejun(Key Laboratory of Material Design and Quantum Simulation,College of Materials Science and Engineering,Changchun University,Changchun 130022,China)

机构地区：[1]长春大学材料科学与工程学院材料设计与量子模拟重点实验室,长春130022

出　　处：《吉林大学学报(理学版)》2025年第2期622-628,共7页Journal of Jilin University:Science Edition

基　　金：吉林省科技厅重点项目(批准号:20230201133GX)。

摘　　要：在保持A位元素Na+Bi总量恒定(x(Na)+x(Bi)=1)和掺杂Mg摩尔分数不变的条件下,通过调整Na和Bi摩尔分数,研究Na^(+)和Bi^(3+)非化学计量比对Na_(0.5+x)Bi_(0.5-x)Ti_(0.99)Mg_(0.01)O_(3-δ)微观结构和电学特性的影响.通过固相法合成Na和Bi不同摩尔分数的样品,利用X射线衍射(XRD)和扫描电子显微镜(SEM)对其结构和微观形貌进行表征,并通过电化学测试评估其电学性能.结果表明:改变Na和Bi的摩尔分数可显著影响样品的晶粒尺寸和电导率;当x=0.02时,样品具有最优的晶粒和晶界电导率性能.因此,通过控制Na和Bi的摩尔分数可有效调节材料的电学性能,为高性能氧离子导体的开发提供实验指导.We studied the effect of non-stoichiometric ratio of Na+and Bi 3+on the microstructure and electrical properties of Na_(0.5+x)Bi_(0.5-x)Ti_(0.99)Mg_(0.01)O_(3-δ)by adjusting the mole fractions of Na and Bi under the condition of maintaining constant total amount of A-site elements(x(Na)+x(Bi)=1)and constant mole fraction of Mg doping.Samples of Na and Bi with different mole fractions were synthesized by using sodid-state method,and their structures and microstructures were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM).Th e electrochemical properties were evaluated by electrochemical testing.The results show that changing the mole fraction of Na and Bi can significatly affect the grain size and conduct ivity of the simple.The sample exhibits optimal grain and grain-boundary conductivity performance when x=0.02.Therefore,controlling the mole fraction of Na and Bi can effec tively modulate the electrical performance of materials,providing experimental guidance for the development of high-performance oxygen ionic conductors.

关 键 词：非化学计量比 氧离子导体 空间电荷势 电导率 

分 类 号：TB39[一般工业技术—材料科学与工程]