Bulk Synthesis and Characterization of Carbon Nanocapsules Containing Lanthanum Carbide

机译：含碳化镧碳纳米胶囊的本体合成与表征

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TEM complemented by ED, EDX and TGA has been used to estimate the optimized condition for the bulk synthesis of carbon nanocapsules containing lanthanum carbide. Higher concentration (1.45 atom%) of La_2O_3 in anode gave, (1) lower arc temperature due to the energy consumption of arc-discharge for reduction of La oxide, (2) more nanocapsules stuffed with LaC_2. And higher arc current density for lower concentration (0.65 atom%) of La_2O_3 in anode gave higher arc temperature, which caused phase separation of carbon and La in arc plasma, forming more graphite sheets and naked LaC_2 particles. Therefore better condition for their mass synthesis will be achieved by controlling arc temperature and La concentration. TGA results revealed that LaC_2 carbon nanocapsules decompose around 500 - 550℃ in air.

机译：用ED，EDX和TGA补充的TEM已被用来估算用于批量合成含碳化镧的碳纳米胶囊的最佳条件。阳极中La_2O_3的浓度较高（1.45原子％），（1）由于电弧放电用于还原La氧化物的能量消耗，电弧温度较低，（2）填充LaC_2的纳米胶囊更多。阳极中较低的La_2O_3浓度（0.65原子％），较高的电弧电流密度会产生较高的电弧温度，从而导致电弧等离子体中的碳和La相分离，形成更多的石墨片和裸露的LaC_2颗粒。因此，通过控制电弧温度和La浓度，可以获得更好的质量合成条件。 TGA结果表明，LaC_2碳纳米胶囊在空气中约500-550℃分解。

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《Proceedings vol.2004-12; Electrochemical Society(ECS) Annual Spring Meeting and International Symposium on Fullerenes, Nanotubes, and Carbon Nanoclusters; 20040509-13; San Antonio,TX(US)》|2004年|P.110-117|共8页
会议地点 San AntonioTX(US)
作者
Kazunori Yamamoto;
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Innovative Research Promotion Office, O-arai Engineering Center, Japan;

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原文格式 PDF
正文语种 eng
中图分类无机高分子化合物（高聚物）;
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Bulk Synthesis and Characterization of Carbon Nanocapsules Containing Lanthanum Carbide

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