【摘要】 采用改进的柠檬酸盐法制备了In、Tb共掺的BaCeO₃基质子导体,分别采用X射线衍射仪和扫描电子显微镜分析了质子导体的相结构和微观形貌,并采用电化学工作站测试了样品的电导率。由于Tb具有较低的电负性,Tb掺杂的BaCeO₃基质子导体具有很高的电导率,并且样品在干燥空气下电导率略高于湿润氢气和湿润氮气。In、Tb共掺的样品具有较好的烧结活性,但其电导率较低。由于Tb较低的电负性,In、Tb共掺杂的样品在CO₂和H₂O中的化学稳定性较差,需要进一步提高。更多还原

【Abstract】 In and Tb co-doped BaCeO₃ proton conductors were prepared by modified citrate method. The phase structure and the microstructure of the conductor were analyzed using X-ray diffraction patterns and scanning electron microscope, respectively. The conductivity was tested by AC impedance method. Because of low electronegativity of Tb, Tb dope BaCeO₃ conductor possessed high electrical conductivity, and the conductivity in dry air atmosphere was slightly higher than that in humidified hydrogen and nitrogen atmosphere. The In, Tb co-doped samples had better sintering activity, but their conductivity was reduced. Though the electronegativity of In was higher, the chemical stability of In, Tb co-doped samples in CO₂ and H₂O was poor, which needed to be further improved.更多还原