改进Stber法制备光子晶体用SiO_2微球  

Preparation of SiO_2 Microspheres Used in Photonic Crystals via Improving Stber Method

作　　者：刘立营[1] 王秀峰[1] 章春香[1] 程冰[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021

出　　处：《材料导报》2008年第12期113-115,121,共4页Materials Reports

基　　金：国家自然科学基金(50372038)

摘　　要：为获得光子晶体用单分散性较好、表面光滑的SiO_2球形颗粒,对传统St(?)ber法进行改进,分析了氨水和正硅酸乙酯(TEOS)浓度对SiO_2微球粒径的影响,提出了单分散SiO_2微球的形成机理,利用X射线衍射分析仪(XRD)和场发射扫描电子显微镜(SEM)对样品结构和形貌进行了表征。XRD分析表明,合成的SiO_2微球为无定形态;SEM照片显示SiO_2微球粒径在292～750nm范围内,微球粒径偏差均在5%以下。SiO2 microspheres used in photonic crystals are prepared by improving the Stoeber method. Effects ot the concentration of ammonia and tetraethoxy silane （TEOS） on the particle sizes of SiO2 are investigated, and then the formation mechanisms of the resultant SiO2 particles are carefully discussed. The structure and micromorphology are characterized by X-ray diffractometer （XRD） and Scanning electron microscope （SEM）. The XRD analysis shows that the structure of SiO2 microspheres is amorphous; SEM images show that the particle sizes of SiO2 mierospheres range from 292nm to 750nm, and the standard deviation of their distribution is less than 5 %.

关 键 词：二氧化硅 制备方法 Stoeber法 光子晶体 单分散 

分 类 号：TB383[一般工业技术—材料科学与工程] O734[理学—晶体学]