Aerosol deposition of (Cu,Ti) substituted bismuth vanadate films
Aerosol deposition of (Cu,Ti) substituted bismuth vanadate films
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DOI：
10.1016/j.tsf.2014.11.037
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发表时间：
2014-12-31
期刊：
影响因子：
2.1
通讯作者：
Moos, Ralf
中科院分区：
文献类型：
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作者：
Exner, Joerg;Fuierer, Paul;Moos, Ralf
钒酸铋，Bi4V2O11，以及具有各种金属(Me)取代的相关化合物，Bi4(MexV1-x)(2)O11-Delta，在已知的固体氧化物电解质中显示出一些最高的离子电导率。用气溶胶沉积法制备了铜和钛取代的钒酸铋薄膜，喷涂法也称为室温冲击固结。得到的薄膜厚度为几微米，致密，与衬底的附着力良好。利用扫描电子显微镜和高温X射线衍射仪研究了温度对薄膜结构和微观结构的影响。颗粒尺寸保持在纳米级，而微应变在500℃以下迅速下降，超过500℃时，粗化和织构迅速增加。在叉指电极上沉积的薄膜的阻抗测量表明，离子电导率存在退火热效应，其电导率超过丝网印刷薄膜，接近大块陶瓷的电导率。(C)2014爱思唯尔B.V.保留所有权利。
Bismuth vanadate, Bi4V2O11, and related compounds with various metal (Me) substitutions, Bi-4(MexV1-x)(2)O11-delta, show some of the highest ionic conductivities among the known solid oxide electrolytes. Films of Cu and Ti substituted bismuth vanadate were prepared by an aerosol deposition method, a spray coating process also described as room temperature impact consolidation. Resultant films, several microns in thickness, were dense with good adhesion to the substrate. Scanning electron microscopy and high temperature X-ray diffraction were used to monitor the effects of temperature on the structure and microstructure of the film. The particle size remained nano-scale while microstrain decreased rapidly up to 500 degrees C, above which coarsening and texturing increased rapidly. Impedance measurements of films deposited on inter-digital electrodes revealed an annealing effect on the ionic conductivity, with the conductivity exceeding that of a screen printed film, and approaching that of bulk ceramic. (C) 2014 Elsevier B.V. All rights reserved.