Abstract

The processes occurring during heating of a stoichiometric mixture of lanthanum, samarium, magnesium, and aluminum hydroxides synthesized by the reverse precipitation method have been studied by DTA/TG and X-ray powder diffraction methods. The conditions for the synthesis of single-phase LaMgAl₁₁O₁₉ and SmMgAl₁₁O₁₉ samples of the magnetoplumbite structure type have been determined, and the isobaric heat capacity has been measured in the temperature range 317–1817 K, showing the absence of structural transformations in this range.

中文翻译：

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LaMgAl11O19和SmMgAl11O19六铝酸盐的合成及高温热容

 抽象的

通过 DTA/TG 和 X 射线粉末衍射方法研究了通过反向沉淀法合成的镧、钐、镁和铝氢氧化物的化学计量混合物加热过程中发生的过程。磁铅石结构类型单相 LaMgAl ₁₁ O ₁₉ 和 SmMgAl ₁₁ O ₁₉ 样品的合成条件为确定了，并且在 317-1817 K 的温度范围内测量了等压热容，表明在此范围内不存在结构转变。