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Pechini溶胶-凝胶法制备超细二氧化硅
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
作者姓名:伍媛婷  王秀峰  仝小飞
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
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
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。

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
Wu Yuanting,Wang Xiufeng,Tong Xiaofei. Synthesis of ultrafine silica powders by Pechini sol - gel method[J]. Inorganic Chemicals Industry, 2011, 43(6): 17
Authors:Wu Yuanting  Wang Xiufeng  Tong Xiaofei
Affiliation:1.School of Materials Science & Engineering,Shaanxi University of Science & Technology,Xi′an 712081,China;2.Caihong Group Company
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.
Keywords:ultrafine silica  pechini sol-gel method  citrate acid  
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