LaF_3多晶粉体离子导电性能的研究  

Study on Ionic Conductivity of LaF_3 Ultrafine Polycrystalline Powder

作　　者：周明[1] 田彦文[2] 王常珍[2] 

机构地区：[1]吉林师范大学计算机学院,吉林四平136000 [2]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《昆明理工大学学报（理工版）》2010年第3期120-124,共5页Journal of Kunming University of Science and Technology(Natural Science Edition)

摘　　要：固体电解质材料电导率高低决定了自身的应用价值.实验由固体电解质超细粉体压片与铂片组成不可逆电池,在常温下采用阻抗谱仪对电池进行阻抗测量,并对电池进行合理的电路等效,最后由阻抗谱图对LaF3超细粉压片的电导率进行计算.结果发现商业粉体压片和微波法制备的超细粉体压片的离子电导率较高,达到10-6S.cm-1数量级,在常温下能用作离子导体.离子导体的电导率在常温下随温度的变化而变化.The application value of solid electrolytes is determined by their ionic conductivity. Electrolyte uhrafine powder tablets and platinum sheets are employed to compose non -reversible cells, whose impedances are then measured by the impedance spectroscopy. By giving the equivalent circuits of the cells, the ionic conductivity of LaF3 ultrafine tablet is calculated. It is found that the ionic conductivities of the commercial LaF3 powder and the uhrafine tablet by the microwave method are higher, reaching 10^-6S ·cm^-1 and being better ionic conductor under normal temperature. The ionic conductivities vary according to the temperature under normal temperature.

关 键 词：固体电解质 LAF3 阻抗谱 离子电导率 

分 类 号：TM911[电气工程—电力电子与电力传动]