钐掺杂镓酸镧基电解质的制备及性能研究  

Preparation and Properties of Sm Doped Lanthanum Gallate Based Electrolyte

作　　者：李静 LI Jing(Shanxi Institute of Technology,Yangquan,Shanxi 045000)

机构地区：[1]山西工程技术学院,山西阳泉045000

出　　处：《化工生产与技术》2023年第1期4-6,9,I0002,共5页Chemical Production and Technology

基　　金：山西工程技术学院校级科研项目(2022007)。

摘　　要：采用传统的固相反应法合成了Sm掺杂La_(0.9)Sr0.1Ga_(0.85)Mg_(0.15)O_(3)电解质,并根据X射线衍射仪、交流阻抗谱和扫描电子显微镜来研究La_(0.9-x)Sm_(x)Sr_(0.1)Ga_(0.85)Mg_(0.15)O_(3)系列电解质的结构、电导率及微观形貌。结果表明,掺杂Sm的样品均具有钙钛矿结构,Sm^(3+)已经进入了La^(3+)晶体格位,形成了La_(0.9-x)Sm_(x)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3)固溶体;电导率与温度的关系服从Arrhenius方程,电解质具有离子导电特征;Sm适量的掺杂,有利于提高LaGaO_(3)基固体电解质(LSGM)氧离子导体的电导率;此系列中掺Sm的质量分数15%是比较合适的,其在850℃时的电导率为41 mS/cm。Sm doped La_(0.9)Sr0.1Ga_(0.85)Mg_(0.15)O_(3) electrolytes have been synthesized by traditional solid-state reaction,The structure,conductivity and microstructure of La_(0.9-x)Sm_(x)Sr_(0.1)Ga_(0.85)Mg_(0.15)O_(3) electrolyte were investigated by XRD,ac impedance spectroscopy and SEM.Results show that Sm-doped samples have a perovskite structure,and the Sm^(3+)ions has entered the La^(3+)lattice site,forming La_(0.9-x)Sm_(x)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3) solid solution;the electrolyte show ionic conductivity based on the fact that the relationship between conductivity and temperature conforms to the Arrhenius equation,proper amount of Sm doped is benefical to high ionic conductivity of LSGM oxygen ion conductor;15%mass farction of Sm is suitable for this series,and its conductivity is 41 mS/cm at 850℃.

关 键 词：LaGaO_(3)基固体电解质 电导率 Sm掺杂 

分 类 号：TQ133.3[化学工程—无机化工]