| 不同水热条件下氧化镧的制备和表征 |
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| 引用本文： | 向杰,杨凯珍,易振华,张雷,赵四勇,刘凤美.不同水热条件下氧化镧的制备和表征[J].广东化工,2008,35(12). |
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| 作者姓名： | 向杰 杨凯珍 易振华 张雷 赵四勇 刘凤美 |
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| 作者单位： | 1. 广州有色金属研究院,广东,广州,510651
2. 广东石油化工研究院,广东,广州,510540 |
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| 摘 要： | 以硝酸镧溶液为原料,以聚乙二醇800为分散剂,用六次甲基四胺作沉淀剂,经水热反应制取前驱体,再经焙烧制得纳米氧化镧。考察了不同水热条件,如水热温度,反应时间,前驱物浓度和冷却方式对制备产品形貌的影响,采用XRD和TEM对粉体进行了表征。结果表明,氧化镧颗粒随着水热温度的提高,反应时间的增长以及前驱物浓度的提高而逐渐长大,团聚现象逐渐加剧;自然冷却方式较之骤冷的方式更加有利于形成小颗粒的氧化镧产品。
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| 关 键 词： | 氧化镧 水热合成 纳米粒子 |
Preparation and Characterization of La2O3 under Different Hydrothermal Conditions |
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| Xiang Jie,Yang Kaizhen,Yi Zhenhua,Zhang Lei,Zhao Siyong,Liu Fengmei.Preparation and Characterization of La2O3 under Different Hydrothermal Conditions[J].Guangdong Chemical Industry,2008,35(12). |
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| Authors: | Xiang Jie Yang Kaizhen Yi Zhenhua Zhang Lei Zhao Siyong Liu Fengmei |
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| Abstract: | Nano-particle of La2O3 was prepared by hydrothermal method with La(NO3)3 as raw material,PEG-800 as dispersant and hexamethylene tetramine as precipitant.The effects of hydrothermal temperature,reaction time,precursor concentration and cooling method on the morphology of the particles were evaluated.The nano-particle was characterized by XRD and TEM techniques.The results showed that the size of nano La2O3 increased gradually with the increase of hydrothermal temperature,reaction time and the precursor concentration.The natural cooling method favor for the formation of small particle of La2O3 compared with that of ice quenching technique. |
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| Keywords: | La2O3 hydrothermal synthesis nano-particle |
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