Electroconduction and linear expansion of solid electrolytes Ce1? x Sm x O2?δ ( x = 0.10?0.30)

A complex investigation of solid electrolytes Ce_1−x Sm _x O_2−δ (x = 0.10−0.30) is performed in a broad temperature interval by methods of x-ray diffraction analysis, electroconduction, dilatometry, differential scanning calorimetry, and thermogravimetry. Ceramic technology is used for the synthesis. The density of the obtained specimens is no lower than 95%. The dilatometry measurements reveal the presence of singularities in the curves obtained at temperatures in the region of 180–230°C, which may be ascribed to a phase transition of the type order-disorder of hypothetical phase Ce₇SmO_15.5. The electroconduction and dilatometry methods also point to the presence of singularities in the temperature dependences in the temperature interval extending from 800 to 870°C. Original Russian Text ? E.G. Vaganov, V.P. Gorelov, N.M. Bogdanovich, I.V. Korzun, V.A. Kazantsev, 2007, published in Elektrokhimiya, 2007, Vol. 43, No. 6, pp. 695–698. Based on the report delivered at the 8th International Meeting on Fundamental Problems of Solid-State Ionics, Chernogolovka (Russia), 2006.