La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3-α)的微乳液法合成及其质子导电性研究  

Proton Conduction in La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_(3-α) Ceramics Prepared by Microemulsion Method

作　　者：朱剑莉[1] 张峰[1] 陈成[1] 马桂林[1] 

机构地区：[1]苏州大学化学化工学院

出　　处：《无机化学学报》2007年第9期1621-1626,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目(No.20171034);苏州大学"211工程"基金资助项目。

摘　　要：采用微乳液法合成了La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_3-α的共沉淀前驱体,经初烧和烧结后制得La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_3-α陶瓷样品,TEM和SEM分析结果表明陶瓷样品具有良好的微观结构,XRD分析结果表明陶瓷样品已形成了单相的LaGaO_3钙钛矿斜方相结构。用气体浓差电池及气体的电化学透过等电化学实验方法对样品的导电性进行了表征和测试,结果表明该样品具有优良的质子导电性能。氢浓差电池电动势的实测值与理论值吻合得很好,离子迁移数为1;氢的电化学透过速率的实测值与理论值吻合得也较好,证明该样品在氢气气氛中是一个优良的质子导体。The co-precipitate precursor of La0.9Sr0.1Ga0.8Mg0.2O3-α ceramics was prepared by microemulsion method, and the ceramics were obtained by calcining and sintering the precursor. The results of TEM and SEM indicate that the ceramic specimen has a good morphology, and XRD result confirms that the ceramics is belong to a single orthorhombic phase of perovskite-type LaGaO3. The conduction behavior was studied by using gas concentration cell and gas electrochemical permeation methods, and the excellent proton conduction was observed. The experimental values of the hydrogen concentration cell coincides well with the theoretical values, and the ionic transport number is unity. The observed rate of electrochemical hydrogen permeation is close to the theoretical rate, verifying that the ceramics is an excellent proton conductor under hydrogen atmosphere.

关 键 词：LAGAO3 质子导体 微乳液法 

分 类 号：O614.2[理学—无机化学] O614.371[理学—化学]