无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2011, Vol. 43 ›› Issue (6): 17-.

• 论文 • 上一篇    下一篇

Pechini溶胶-凝胶法制备超细二氧化硅

伍媛婷1,王秀峰1,仝小飞2   

  1. 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
  • 出版日期:2011-06-10 发布日期:2011-06-14

Synthesis of ultrafine silica powders by Pechini sol-gel method

Wu Yuanting1,Wang Xiufeng1,Tong Xiaofei2   

  1. 1.School of Materials Science & Engineering,Shaanxi University of Science & Technology,Xi′an 712081,China;2.Caihong Group Company
  • Published:2011-06-10 Online:2011-06-14

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

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.

Key words: ultrafine silica, pechini sol-gel method, citrate acid

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