| SiO2-TiO2 复合微粒的研究 |
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| 引用本文： | 喻志刚,袁荞龙,应圣康. SiO2-TiO2 复合微粒的研究[J]. 复合材料学报, 2000, 17(4): 71-75 |
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| 作者姓名： | 喻志刚 袁荞龙 应圣康 |
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| 作者单位： | 华东理工大学材料科学研究所289 信箱, 上海 200237 |
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| 摘 要： | 通过溶胶法制备了18nm 和40nm 两种粒径均匀、单分散的SiO22TiO2 复合微粒, 确定了最佳合成条件。电镜照片显示, 水和TiO2 粒子接枝于SiO2 粒子表面, 成针状向外生长。对包覆过程、复合纳米粉末煅烧行为、表面改性的研究表明, 1100℃～ 1200℃TiO2 由锐钛型向金红石型转变, SiO2 的鳞石英晶型也开始形成。甲醇改性的TS纳米粉末能较好的再分散于乙醇中。
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| 关 键 词： | SiO22TiO2 复合微粒 溶胶 钛酸 晶相 |
| 收稿时间： | 1999-02-11 |
| 修稿时间： | 1999-07-28 |
STUDY ON SiO2-TiO2 COMPOSITE PARTICLE |
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| YU Zhi-gang,YUAN Qiao-long,YING Sheng-kang. STUDY ON SiO2-TiO2 COMPOSITE PARTICLE[J]. Acta Materiae Compositae Sinica, 2000, 17(4): 71-75 |
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| Authors: | YU Zhi-gang YUAN Qiao-long YING Sheng-kang |
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| Affiliation: | Institute of Material Science and Technology ECUST, Shanghai 200237, China |
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| Abstract: | Two kinds of monodispersed SiO2 TiO2 composite particles with the uniform diameter of 18 nanometers and 40 nanometers separately were prepared by sol technology,and the best synthesis condition was also determined. Electron microscope revealed that the hydrated TiO 2 particle had been grafted onto the surface of SiO 2 particle, growing outside in a needle shape. Study on the covering process,the calcination behavior of the composite ultrafine powder and the surface modification displayed that the crystal form of TiO 2 transformed from anatase to rutile at 1100℃~1200℃, the o tridymite form of SiO 2 came into being in the same condition and the SiO2 TiO2 ultrafine powder modified by methanol could be redispersed well in ethanol. |
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| Keywords: | SiO 2 TiO 2 composite particle sol titanic acid crystal form |
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