BaCe_(0.7)Y_(0.3-x)Ta_xO_(3-δ)(x=0.05,0.1)质子导体稳定性和电导率研究  

Conductivity and stability of BaCe_(0.7)Y_(0.3-x)Ta_xO_(3-δ)(x=0.05,0.1) ceramics

作　　者：吕强 杨春利[1] 马欣宇 严敏[1] 陈红 LYU Qiang;YANG Chunli;MA Xinyu;YAN Min;CHEN Hong(School of Minerals Processing&Bioengineering,Functional Materials Laboratory,College of Materials&Mineral Resources,Xi'an University of Architecture and Technology,Xi’an 710055,China)

机构地区：[1]西安建筑科技大学材料与矿资学院功能材料研究所,西安710055

出　　处：《功能材料》2018年第4期4161-4165,共5页Journal of Functional Materials

基　　金：国家自然科学青年基金资助项目(21506168);西安建筑科技大学人才科技基金资助项目(RC1251)

摘　　要：通过液相法制备了BaCe_(0.7)Y_(0.3-x)Ta_xO_(3-δ)(x=0.05,0.1)质子导体粉体并压制成膜,分析了不同温度烧结后的微观形貌,并测试了其电导率与稳定性。结果表明,Ta掺杂降低了高温质子导体BaCe_(0.7)Y_(0.3-x)Ta_xO_(3-δ)的烧结活性,并且样品在沸水和CO_2气氛中的化学稳定性随着Ta含量的增加而增高;BaCe_(0.7)Y_(0.3-x)Ta_xO_(3-δ)的电导率随温度升高而升高,BaCe_(0.7)Y_(0.25)Ta_(0.05)O_(3-δ)在干燥空气气氛条件下的电导率最高,而BaCe_(0.7)Y_(0.2)Ta_(0.1)O_(3-δ)则在湿润10%H_2+90%Ar(约3%H_2O)气氛下电导率最高。BaCe0.7Y0.3-xTaxO 3-δ(x=0.05,0.1)proton conductor powder prepared by liquid phase method was pressed into disk-shape and then sintered at different temperature.The morphology,conductivity and chemical stability were studied.The results indicate that Ta doping can decrease the sintering activity of the high temperature proton conductor BaCe 0.7 Y 0.3-x Ta x O 3-δ.However,the tolerance to boiling water and CO 2 improves for BaCe 0.7 Y 0.3-x Ta x O 3-δsamples with an increase of Ta-doping.The conductivity of BaCe 0.7 Y 0.3-x Ta x O 3-δincreases with the temperature increasing.In addition,BaCe 0.7 Y 0.25 Ta 0.05 O 3-δshows the highest conductivity in dry air,while BaCe 0.7 Y 0.2 Ta 0.1 O 3-δhas the highest conductivity in wet H 2 90%+10%Ar(about 3%H 2 O)atmosphere.

关 键 词：高温质子导体 烧结性能 微观结构 电导率 稳定性 

分 类 号：O614[理学—无机化学] TM911[理学—化学]