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| 纳米La_2O_3粉晶的制备及其表征 | |
| 引用本文： | 姚丽珠,田彦文,储刚.纳米La_2O_3粉晶的制备及其表征[J].稀土,2009,30(6). |
| 作者姓名： | 姚丽珠 田彦文 储刚 |
| 作者单位： | 1. 东北大学,材料与冶金学院,辽宁沈阳110004;辽宁石油化工大学,石油化工学院,辽宁抚顺113001 2. 东北大学,材料与冶金学院,辽宁沈阳110004 3. 辽宁石油化工大学,化学与材料科学学院,辽宁抚顺113001 |
| 基金项目： | 国家高技术研究发展计划项目资助 |
| 摘 要： | 以La(NO_3)_3·6H_2O、NH_4HCO_3和聚乙二醇为原料,利用沉淀法制备了纳米La_2O_3粉体,利用XRD,TG-DTA和TEM等测试方法对干凝胶热分解过程及最终形成的纳米La_2O_3粉体进行了分析和表征,XRD法考察了前驱体在不同热处理条件下产物物相和晶粒度的变化情况,实验结果表明,在适当工艺参数下,前驱体经720℃,1h焙烧所得产物为平均粒径小于50nm的La_2O_3粉体. |
| 关 键 词： | 纳米晶 沉淀法 晶粒度 |
Preparation and Characterization of Nanocrystalline La_2O_3 |
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| YAO Li-zhu,TIAN Yan-wen,CHU Gang.Preparation and Characterization of Nanocrystalline La_2O_3[J].Chinese Rare Earths,2009,30(6). | |
| Authors: | YAO Li-zhu TIAN Yan-wen CHU Gang |
| Abstract: | Nanocrystalline La_2O_3 was prepared by chemical precipitation process using La(NO_3)_3·6H_2O,NH_4HCO_3 and PEG.The decomposition process of xerogelspowder and the calcened nanocrystalline La_2O_3 formed at the end were characterized by XRD,TG-DTA and TEM. The component and size of the product were characterized by X-ray diffraction (XRD) under different conditions of heat treatment. The result shows that the nanocrystalline La_2O_3 can be obtained with average particle diameter of 50nm under appropriate conditions. |
| Keywords: | La_2O_3 nanocrystalline La_2O_3 chemical precipitation grain size |
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