Water incorporation and proton conductivity in titanium substituted barium indate
Water incorporation and proton conductivity in titanium substituted barium indate
复制标题
钛取代硼酸钡中的水掺入和质子电导率
DOI：
10.1016/j.jpowsour.2009.08.086
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发表时间：
2010
影响因子：
9.2
通讯作者：
O. Joubert
中科院分区：
文献类型：
--
作者：
É. Quarez;S. Noirault;M. Caldes;O. Joubert
用热重分析法研究了类钙钛矿型氧缺位化合物Ba2(In1−xTix)2O5+x-1−x(0≤x<；0.7)在平衡条件下的吸水率，提取了其水化过程的热力学数据。从X射线衍射数据推断的水化过程中晶格体积的变化是表征钙钛矿型质子导体的一个重要参数。通过在干湿大气中的电导率测量，确定了BitX化合物的质子电导率、迁移数和质子扩散系数。Ba2(In1−xTix)2O5+x-1−x化合物的电导率在450℃以下以质子为主，在450℃时，BIT02的质子电导率为1.1×10−3Scm−1。
Water uptake in the perovskite-like oxygen deficient compounds Ba2(In1−xTix)2O5+x□1−x(0≤x<0.7) (called BITx) was investigated by thermal gravimetric analysis (TGA) at equilibrium conditions and thermodynamic data of the hydration process were extracted. The change of the lattice volume upon hydration, inferred from X-ray diffraction data, appears as an important parameter for the characterization of perovskite-type proton conductors. The proton conductivity, the transport number and the proton diffusion coefficients for BITx compounds were determined from conductivity measurements performed under wet and dry atmosphere. The conductivity of Ba2(In1−xTix)2O5+x□1−xcompounds is mainly protonic up to 450°C and the best level of proton conductivity was obtained for BIT02 with a value of 1.1×10−3Scm−1at 450°C.