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首页> 外文期刊>Materials and Manufacturing Processes >Low-Temperature Synthesis of Lithium Manganese Oxide Using LiCl-Li_2CO_3 and Manganese Acetate Eutectic Mixture
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Low-Temperature Synthesis of Lithium Manganese Oxide Using LiCl-Li_2CO_3 and Manganese Acetate Eutectic Mixture

机译：LiCl-Li_2CO_3和醋酸锰共晶混合物的低温合成锂锰氧化物

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摘要

Fine crystalline LiMn_2O_4 powders have been prepared by molten salt synthesis (MSS) at 500° C, using an eutectic mixture of lithium chloride, lithium carbonate, and manganese acetate salts. Thermogravimetric and differential thermal analysis (TGA/DTA) measurements are performed to investigate the thermal decomposition behavior of the precursor salts. The single-phase cubic structure of LiMn_2O_4 is confirmed by X-ray powder diffraction analysis. The lattice parameter is found to be 8.1967 A0. The molecular structure of the compound is studied using FT-IR and Raman spectroscopy. The chemical composition and the purity of the synthesized powders are determined using atomic absorption spectroscopy (AAS), energy-dispersive X-ray spectroscopy (EDAX), and carbon hydrogen nitrogen sulfur (CHNS) analyses. The magnetic behavior of the compound is examined using electron paramagnetic resonance (EPR) spectroscopy. The morphology of the powders is assessed by scanning electron microscopy (SEM). The average particle size of the powders is ranging between 10-20 μm. This investigation shows that pure crystalline lithium manganese oxide powders can be conveniently synthesized by molten flux method.
机译：通过使用氯化锂，碳酸锂和乙酸锰盐的低共熔混合物，在500℃下通过熔融盐合成（MSS）制备了微晶状的LiMn_2O_4粉末。进行热重和差热分析（​​TGA / DTA）测量以研究前体盐的热分解行为。通过X射线粉末衍射分析证实了LiMn_2O_4的单相立方结构。晶格参数为8.1967 A0。使用FT-IR和拉曼光谱研究了该化合物的分子结构。合成粉末的化学组成和纯度使用原子吸收光谱（AAS），能量色散X射线光谱（EDAX）和碳氢氮硫（CHNS）分析确定。使用电子顺磁共振（EPR）光谱检查化合物的磁性行为。通过扫描电子显微镜（SEM）评估粉末的形态。粉末的平均粒度为10-20μm。该研究表明，可以通过熔融助熔剂法方便地合成纯结晶的锂锰氧化物粉末。

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