| 超临界流体干燥法制备纳米级TiO2的研究 |
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| 引用本文： | 张敬畅,曹维良,于定新,石锦华,窦正仓.超临界流体干燥法制备纳米级TiO2的研究[J].无机材料学报,1999,14(1):29-35. |
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| 作者姓名： | 张敬畅 曹维良 于定新 石锦华 窦正仓 |
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| 作者单位： | 北京化工大学应用化学系!北京，100029 |
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| 基金项目： | 国家自然科学基金!29643001 |
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| 摘 要： | 本文以廉价无机盐为原料，采用溶胶－凝胶法结合超临界流体干燥制备了纳米级ＴｉＯ２，并采用ＸＲＤ，ＤＴＡ－ＴＧ、ＴＥＭ技术研究了Ｓｏｌ－Ｇｅｌ过程中溶液的ＰＨ值、浓度、陈化时间及ＳＣＦＤ技术等条件对ＴｉＯ２粒径大小的影响。
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| 关 键 词： | 超临界流体干燥 二氧化钛 气凝胶 纳米材料 |
| 收稿时间： | 1998-4-6 |
| 修稿时间： | 1998-6-12 |
Preparation of TiO2 Ultrafine Powder in Terms of SCFD Technique |
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| ZHANG Jing-Chang,CAO Wei-Liang,YU Ding-Xin,SHI Jin-Hua,DOU Zheng-Chang.Preparation of TiO2 Ultrafine Powder in Terms of SCFD Technique[J].Journal of Inorganic Materials,1999,14(1):29-35. |
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| Authors: | ZHANG Jing-Chang CAO Wei-Liang YU Ding-Xin SHI Jin-Hua DOU Zheng-Chang |
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| Abstract: | Titanium dioxide ultrafine powders were prepard by sol-gel and supercritical fluid drying(SCFD) methods from cheap inorganic salts as raw materials. The ultrafine powders were characterized in terms of XRD, DTA-TG and TEM techniques. The dependence of particle size onsolution PH value, concentration, ageing time and SCFD condition was also investigated. It wasfound that the ultrafine powders so obtained eXhibit small crystallite sizes of 3-6urn, better thermal stability and less weight loss. |
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| Keywords: | supercritical fluid drying nanometer material TiO_2 gasgel |
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