Термическое расширение композитных материалов на основе сложных оксидов Sr2Ni1-xMgxMoO6

Abstract

The main aim of the study was optimization of physico-chemical properties of Sr2NiMoO6 double perovskite by means of Ni-substitution on Mg and synthesize on the base of Sr2Ni1-xMgxMoO6 solid solutions (x = 0.25; 0.5; 0.75) the composite materials with SrMoO4 phase. The methods used in the study: XRD analysis, high-temperature X-Ray analysis, Rietveld method, high-temperature dilatometry. It was shown that nickel substitution on magnesium in Sr2Ni1–уMgуMoO6 decreased values of the linear coefficient of the thermal expansion (LCTE). It was considered that SrMoO4 phase addition to Sr2Ni1-уMgуMoO6 oxides increased the linear coefficient of the thermal expansion of the aiming ceramic samples. It was concluded that composites on the base of Sr2Ni1-уMgуMoO6 oxides are the sufficiently thermally compatible anode materials with electrolyte for the medium-temperature solid oxide fuel cells.