کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1290989 | 973346 | 2007 | 6 صفحه PDF | دانلود رایگان |
In this paper the results of thermal expansion coefficient measurements of different singly and doubly doped ceria electrolytes, together with results for selected cathode materials from (La,Sr)(Co,Fe,Ni)O3 system are given. A high temperature chemical stability of the cathode–electrolyte interface was measured on 1:1 wt. mixtures of previously characterized ceria and perovskite powders. The samples were heated at 800, 1000 or at 1200 °C in air for 6 or 100 h. Chemical reactivity investigations were conducted using XRD with Rietveld analysis.For all heated samples the crystal structure of both components were preserved. However, their lattice parameters evolved to a different extent, suggesting the existence of cation exchange. A formation of the solid state solution between Ce1−xRExO2−x/2 and La(Co,Fe,Ni)O3−δ was found, with mobile La cation. On the basis of the obtained results a qualitative mechanism of the observed reaction was proposed.
Journal: Journal of Power Sources - Volume 173, Issue 2, 15 November 2007, Pages 675–680