| Pechini溶胶-凝胶法制备超细二氧化硅 |
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| 引用本文： | 伍媛婷,王秀峰,仝小飞. Pechini溶胶-凝胶法制备超细二氧化硅[J]. 无机盐工业, 2011, 43(6): 17 |
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| 作者姓名： | 伍媛婷 王秀峰 仝小飞 |
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| 作者单位： | 1.陕西科技大学材料科学与工程学院，陕西西安 710021;2.彩虹集团公司 |
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| 基金项目： | 陕西省教育厅科研计划项目，陕西省自然科学基金项目 |
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| 摘 要： | 以乙醇和去离子水为溶剂，以正硅酸乙酯为原料，柠檬酸为络合剂，采用Pechini溶胶-凝胶法制备了超细二氧化硅粉体，采用热分析（TG-DTG、DSC）、X射线衍射（XRD）分析、傅里叶红外光谱（FT-IR）分析、场发射扫描电镜（FESEM）分析等对二氧化硅粉体制备过程中的物理化学变化进行了研究。结果表明：1 000 ℃以下煅烧所得二氧化硅粉体均为非晶相，pH影响了煅烧过程中有机物的降解燃烧；煅烧温度为500 ℃时，所得二氧化硅纳米粉体的粒径约为10 nm；煅烧温度升高至600 ℃时，粉体团聚严重，晶粒尺寸增大至20 nm。
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| 关 键 词： | 超细二氧化硅 Pechini溶胶-凝胶法 柠檬酸 |
Synthesis of ultrafine silica powders by Pechini sol - gel method |
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| Wu Yuanting,Wang Xiufeng,Tong Xiaofei. Synthesis of ultrafine silica powders by Pechini sol - gel method[J]. Inorganic Chemicals Industry, 2011, 43(6): 17 |
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| Authors: | Wu Yuanting Wang Xiufeng Tong Xiaofei |
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| Affiliation: | 1.School of Materials Science & Engineering,Shaanxi University of Science & Technology,Xi′an 712081,China;2.Caihong Group Company |
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| Abstract: | Using ethanol and deionized water as solvent,tetraethyl orthosilicate as raw material,and citric acid as complexing agent,ultrafine silica(SiO2) powders were prepared by Pechini sol-gel method.The means of TG-DTG-DSC,XRD,FT-IR,and FESEM etc.were used to analyze the physical and chemical changes during the preparation process.Results showed that the prepared SiO2 powders were amorphous phase when calcined below 1 000 ℃;the pH had a great influence on degradation combustion of organics;the SiO2 powders with an average particle size of about 10 nm were synthesized when calcined at 500 ℃;while calcined at 600 ℃,the SiO2 powders seriously conglomerated and the average size increased to 20 nm. |
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| Keywords: | ultrafine silica pechini sol-gel method citrate acid |
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