| Preparation and Characterization of Porous Yttrium Oxide Powders with High Specific Surface Area |
| |
| 作者姓名： | 李永绣 林小云 王义振 罗军明 孙伟丽 |
| |
| 作者单位： | Research Center for Rare Earths & Micro/nano Functional Materials Nanchang University Nanchang 330047 China，Research Center for Rare Earths & Micro/nano Functional Materials Nanchang University Nanchang 330047 China，Research Center for Rare Earths & Micro/nano Functional Materials Nanchang University Nanchang 330047 China，Research Center for Rare Earths & Micro/nano Functional Materials Nanchang University Nanchang 330047 China，Research Center for Rare Earths & Micro/nano Functional Materials Nanchang University Nanchang 330047 China |
| |
| 基金项目： | 国家自然科学基金，National Nature Science Foundation of China |
| |
| 摘 要： | Y2O3isoftenusedinthemanufactureofphos phorsandceramics1～3].However,itisalsousedas selectivecatalysts1,4,5],suchasforthedehydrationof2alkanols,thedimerizationofmethane,1butene isomerization,hydrogenationof1,3butadieneandac etonealdoladdition,andsupport6,7]formetalsthat catalyzetheformationofmethanolfromCO2andH2.It iswidelyacceptedthatthecatalysispropertiesofox idesdependstronglyontheirphysicalcharacteristics,especiallyontheirspecificsurfaceareaandporous structure.Agreatdealofattentionhasb…
|
| 关 键 词： | 氧化钇 多孔材料 制备 表征 粉末冶金 稀土 |
| 文章编号： | 1002-0721（2006）01-0034-05 |
| 收稿时间： | 2005-03-06 |
| 修稿时间： | 2005-06-03 |
Preparation and Characterization of Porous Yttrium Oxide Powders with High Specific Surface Area |
| |
| Yongxiu , Xiaoyun Lin, Yizheng Wang, Junming Luo,Weili Sun.Preparation and Characterization of Porous Yttrium Oxide Powders with High Specific Surface Area[J].Journal of Rare Earths,2006,24(1):34-38. |
| |
| Authors: | Yongxiu Xiaoyun Lin Yizheng Wang Junming Luo Weili Sun |
| |
| Affiliation: | Research Center for Rare Earths & Micro/nano Functional Materials, Nanchang University, Nanchang 330047, China |
| |
| Abstract: | The porous cubic yttrium oxides with high specific surface area were prepared by the explosive decomposition of yttrium nitrate and its complex formed with methyl salicylate. The specific surface area and properties of powders synthesized at various temperatures were characterized using BET, X-ray diffraction (XRD), infrared spectra (IR), and scanning electron microscopy (SEM). The results indicate that the highest specific surface area is found to be 65.37 m2*g-1 at the calcination temperature of 600 ℃, and then decreases to 20.33 m2*g-1 with the calcination temperature rising from 600 to 900 ℃. The powders show strong surface activity for adsorping water and carbon dioxide in air, which also decreases with the rising calcination temperature. The drop both on the surface area and surface activity of samples at higher temperatures may be due to pore-narrowing(sintering) effects. |
| |
| Keywords: | porous yttrium oxide high surface area explosive decomposition rare earths |
| 本文献已被 CNKI 万方数据 ScienceDirect 等数据库收录！ |
