Abstract

Using X-ray powder diffraction and thermal analysis (TG–DSC), samples of the quasi-ternary system Li₂O–Mn₂O₃–Eu₂O₃, synthesized from precursors subjected to preliminary mechanochemical activation and annealed in air at 700–1100°C, have been studied. An assessment is given of the possibility of Mn for Eu substitution in the spinel LiMn_{2 – x}Eu_xO₄. A subsolidus isobaric diagram of the Li₂O–Mn₂O₃–Eu₂O₃ system was constructed. Using models of polythermal sections LiEuO₂–LiMnO₂ and LiEuO₂–LiMn₂O₄, a projection of the liquidus surface of the quasi-ternary system Li₂O–Mn₂O₃–Eu₂O₃ was obtained. The temperatures of eutectic and peritectic equilibria involving three crystalline phases and a melt have been determined.

中文翻译：

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准三元体系 Li2O–Mn2O3–Eu2O3 中的相平衡

摘要

使用X射线粉末衍射和热分析（TG-DSC），准三元体系Li ₂ O-Mn ₂ O ₃ -Eu ₂ O ₃的样品由经过初步机械化学活化的前驱体合成，并在700°C的空气中退火–1100°C，已被研究。评估了尖晶石LiMn _{2 – x} Eu _x O ₄中Mn替代Eu的可能性。构建了Li ₂ O-Mn ₂ O ₃ -Eu ₂ O _{3体系的亚固相线等压线图。利用多温度截面LiEuO 2} –LiMnO ₂和LiEuO ₂ –LiMn ₂ O ₄模型，得到了准三元体系Li ₂ O-Mn ₂ O ₃ –Eu ₂ O _{3的液相线面投影。}涉及三个结晶相和熔体的共晶和包晶平衡温度已经确定。