| 二氧化硅基多孔块材的制备及其热稳定性 |
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| 引用本文： | 张丽杰,谷景华,姚红英,张跃. 二氧化硅基多孔块材的制备及其热稳定性[J]. 无机材料学报, 2011, 0(9): 949-954 |
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| 作者姓名： | 张丽杰 谷景华 姚红英 张跃 |
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| 作者单位： | 北京航空航天大学材料科学与工程学院空天材料与服役教育部重点实验室;复旦大学物理系; |
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| 基金项目： | 国家自然科学基金(51072010)~~ |
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| 摘 要： | 以非离子型表面活性剂P123和三甲基苯的微乳液为模板剂合成介孔SiO2粉体.以此粉体为原料,经干压成型、烧结制备多孔SiO2块材.分别用AlOOH溶胶和TiO2溶胶包覆多孔SiO2粉体,制成多孔SiO2/Al2O3块材和SiO2/TiO2块材.采用XRD、SEM、TEM、N2吸附法和阿基米德排水法对所制粉体和块材进行了表征,并研究了块材的热稳定性.结果表明,600～700℃烧结的多孔SiO2基块材的孔隙率为74%～76%.与多孔SiO2块材相比,在800～1000℃范围内,SiO2/Al2O3块材的热稳定性显著提高,SiO2/TiO2块材的热稳定性在800～900℃范围内有一定改善.
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| 关 键 词： | 多孔块材 介孔 二氧化硅 热稳定性 三氧化二铝 |
Preparation and Thermal Stability of Porous Silica-based Monoliths |
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| ZHANG Li-Jie,GU Jing-Hua,YAO Hong-Ying,ZHANG Yue,School of Materials Science , Engi-neering,Beihang University,Beijing ,China. Preparation and Thermal Stability of Porous Silica-based Monoliths[J]. Journal of Inorganic Materials, 2011, 0(9): 949-954 |
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| Authors: | ZHANG Li-Jie GU Jing-Hua YAO Hong-Ying ZHANG Yue School of Materials Science Engi-neering Beihang University Beijing China |
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| Affiliation: | ZHANG Li-Jie1,GU Jing-Hua1,YAO Hong-Ying2,ZHANG Yue1(1.Key Laboratory of Aerospace Materials and Performance(Ministry of Education),School of Materials Science and Engi-neering,Beihang University,Beijing 100191,China,2.Department of Physics,Fudan University,Shanghai 200433,China) |
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| Abstract: | Porous monoliths with high porosity and improved high temperature stability are required in heat insula-tion.Mesoporous SiO2 powder was synthesized from tetraethyl orthosilicate using oil-in-water microemulsions composed of non-ionic surfactant P123 and 1,3,5-trimethylbenzene as template.Porous SiO2 monoliths were pre-pared from the mesoporous SiO2 powder by dry pressing followed by sintering.Porous SiO2/Al2O3 monoliths and SiO2/TiO2 monoliths were prepared from mesoporous SiO2 powders coated with boehmite ... |
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| Keywords: | porous monolith mesoporous silica thermal stability alumina |
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