Phase States in the Li–Mn–Eu–O System

IF 0.4 Q4 METALLURGY & METALLURGICAL ENGINEERING

Russian Metallurgy (Metally) Pub Date : 2024-03-20 DOI:10.1134/S0036029523110149

G. A. Buzanov, G. D. Nipan

引用次数: 0

Abstract

Polycrystalline samples of the Li–Mn–Eu–O system were obtained by preliminarily ball-milled precursor mixtures annealing in air (700, 800, 900, 1000, and 1100°C). The obtained products were studied by X-ray powder diffraction and thermogravimetry (TG-DSC). The possibility of substituting Mn with Eu for spinel LiMn_2–xEu_xO₄ was assessed. Within the framework of the Li–Mn–Eu concentration triangle, a subsolidus isobaric diagram and a projection of the liquidus surface of the Li–Mn–Eu–O system were constructed using models of polythermal phase diagrams of the LiEuO₂–LiMnO₂ and LiEuO₂–LiMn₂O₄ sections. The temperatures of eutectic equilibria involving three crystalline phases and a melt were determined.

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锂-锰-欧-氧体系中的相态

通过在空气中（700、800、900、1000 和 1100°C ）退火初步球磨的前驱体混合物，获得了锂-锰-欧-氧体系的多晶样品。通过 X 射线粉末衍射和热重分析法（TG-DSC）对获得的产品进行了研究。评估了用 Eu 取代 Mn 以制造尖晶石 LiMn2-xEuxO4 的可能性。在锂-锰-铕浓度三角形的框架内，利用 LiEuO2-LiMnO2 和 LiEuO2-LiMn2O4 部分的多热相图模型，构建了锂-锰-铕-O 体系的亚固态等压线图和液面投影图。确定了涉及三个结晶相和一个熔体的共晶平衡温度。

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来源期刊

Russian Metallurgy (Metally) METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

0.70

自引率

25.00%

发文量

140

期刊介绍： Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.