溶胶-凝胶制备纳米TiO_2及晶型转变的研究  

TiO_2 Nano-powders Produced by Sol-gel and Transformation of Crystal Type

作　　者：尤玉飞[1] 徐春花[1] 王俊鹏[1] 王镜喆[1] 张军涛[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023

出　　处：《河南科技大学学报（自然科学版）》2013年第2期5-7,共3页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金/香港合作基金项目(10831165504);河南省教育厅自然科学基础研究计划基金项目(2010A430006)

摘　　要：用溶胶-凝胶法制备纳米TiO2粉体。研究了在400～700℃热处理对纳米粉体尺寸及晶体结构转变的影响。用X射线衍射仪和透射电子显微镜分别对制备产物的物相、形貌进行表征和分析。用Spurr-Myers方法对制备产物中不同相的相对质量含量进行分析。研究结果表明:随热处理温度升高,粉体由锐钛矿相向金红石相转变,晶粒尺寸从10 nm增大到60 nm。TiO2 nano-powders were prepared by sol-gel and were heated at 400~700 ℃ to study sizes and phase transformation of TiO2 nano powders.The crystalline structures and morphology of the obtained products were characterized by X-ray diffraction(XRD) and transmission electron microscopy(TEM).The relative content of various phases were analyzed by Spurr-Myers method.The results turn out that the crystalline phase transforms from anatase to rutile and the size of TiO2 nano-powders increases from 10 nm to 60 nm with increasing the temperature of heat treatment.

关 键 词：溶胶-凝胶法 纳米TIO2粉体 相变 温度 

分 类 号：TB383[一般工业技术—材料科学与工程]