Nanoscale observation of morphological transformation during ageing of silica and silica-alumina
文献类型：期刊论文
| 作者 | Yao, Nan; Yeung, King Lun; Xiong, Guoxing |
| 刊名 | journal of sol-gel science and technology
 |
| 出版日期 | 2006-08-01 |
| 卷号 | 39期号:2页码:139-150 |
| 关键词 | AFM sol-gel silica-alumina particle growth |
| 英文摘要 | atomic force microscopy (afm) was used for in-situ observation of nanoscale morphological transformations during the ageing step in sol-gel synthesis. silica, alumina and silica-alumina samples with different si/al ratios were prepared from inorganic salt precursors and geled at low ph. silica and silica-alumina samples formed branch-like gel network made of nanometer-sized clusters. during ageing at room temperature, the overall structure of the gel network remained unchanged but the clusters underwent phase transformation, coaslesence, coarsening, fragmentation, as well as dissolution resulting in the internal restructuring of the gel material. morphological transformation associated with crystallization of pseudo-boehmite phase was observed for the alumina samples. these nanometer-scale processes are expected to play a key role in dictating the material properties of the final sol-gel product. |
| WOS标题词 | science & technology ; technology |
| 类目[WOS] | materials science, ceramics |
| 研究领域[WOS] | materials science |
| 关键词[WOS] | angle neutron-scattering ; atomic-force microscopy ; x-ray-scattering ; sol-gel ; catalysts ; gelation ; nanocomposites ; aggregation ; polypyrrole ; spherulites |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000239812800009 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/140305]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Hong Kong Univ Sci & Technol, Dept Chem Engn, Kowloon, Hong Kong, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yao, Nan,Yeung, King Lun,Xiong, Guoxing. Nanoscale observation of morphological transformation during ageing of silica and silica-alumina[J]. journal of sol-gel science and technology,2006,39(2):139-150. |
| APA | Yao, Nan,Yeung, King Lun,&Xiong, Guoxing.(2006).Nanoscale observation of morphological transformation during ageing of silica and silica-alumina.journal of sol-gel science and technology,39(2),139-150. |
| MLA | Yao, Nan,et al."Nanoscale observation of morphological transformation during ageing of silica and silica-alumina".journal of sol-gel science and technology 39.2(2006):139-150. |
入库方式： OAI收割
来源：大连化学物理研究所
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