| 稻壳灰制备掺杂TiO2硅气凝胶研究 |
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| 引用本文： | 李学伟,李壶,张赛镭,杨丽丽.稻壳灰制备掺杂TiO2硅气凝胶研究[J].稀有金属材料与工程,2007,36(A01):43-45. |
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| 作者姓名： | 李学伟 李壶 张赛镭 杨丽丽 |
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| 作者单位： | 黑龙江科技学院材料科学与工程学院,黑龙江哈尔滨150027 |
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| 基金项目： | 鸡西市科研项目（04-24）资助 |
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| 摘 要： | 以稻壳为硅源制备SiO2气凝胶，在溶胶凝胶过程中加入TiO2纳米粉末，可制得掺杂TiO2硅气凝胶。通过SEM、BET吸附．脱附测试等手段，与同种方法制得的纯SiO2气凝胶在结构和物性特征方面等进行了比较。结果显示，掺杂TiO2气凝胶的平均颗粒直径为50nm左右，而纯SiO2气凝胶的粒径约为20nm，且孔洞直径明显减小、孔径分布更为均匀；此外，TiO2纳米粉末的加入可以使气凝胶的弹性模量提高约23％，并且通过TiO2对气凝胶溶胶-凝胶过程的影响研究了其影响机理。
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| 关 键 词： | 稻壳灰 二氧化钛 硅气凝胶 |
| 文章编号： | 1002-185X（2007）S1-0043-03 |
| 修稿时间： | 2006-10-112007-03-29 |
Study on the SiO2 Aerogels Doped with TiO2 Powder Prepared by Rice Hull Ash |
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| Li Xuewei, Li Yao, Zhang Sailei, Yang Lili.Study on the SiO2 Aerogels Doped with TiO2 Powder Prepared by Rice Hull Ash[J].Rare Metal Materials and Engineering,2007,36(A01):43-45. |
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| Authors: | Li Xuewei Li Yao Zhang Sailei Yang Lili |
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| Affiliation: | College of Materials Science and Engineering, Heilongjiang Institute of Science and Technology, Harbin 150027, China |
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| Abstract: | SiO2 aerogel doped with TiO2 powder was produced from rice hull ash by sol-gel process. The structure and properties of the doped silica aerogels and the pure silica aerogels prepared with the same method were studied by SEM and BET. It is showed that the doping of TiO2 nanopowder could increase the average particle size of samples from around 20 nm to roughly 50 nm. The pore diameter of the pure silica aerogels is much smaller and more uniformly distributed. The elastic module of samples is enhanced by 23 % with adding TiO2 nanopowders. Furthermore, the mechanism of the sol-gel process was studied. |
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| Keywords: | rice hull ash TiO2 silica aerogels |
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